diff --git a/ChangeLog b/ChangeLog
index 3f857b7d..9e348d48 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -9,6 +9,11 @@
 - better resolution unit handling in deprecated im_vips2tiff()
 - use TIFF_CFLAGS output from pkg-config (thanks Jay)
 - much faster vips_argument_map()
+- make jpeg pyramids work with tiff4
+- tiff loader always offers THINSTRIP (thanks Diuming)
+- add "nocache" operation flag, set for sequential load (thanks Diuming)
+- fix a crash in the tiff reader for huge values of RowsPerStrip (thanks
+  Nicolas)
 
 19/4/12 started 7.28.5
 - ifthenelse blend mode was broken
diff --git a/libvips/foreign/foreign.c b/libvips/foreign/foreign.c
index 9f2337fb..92482efd 100644
--- a/libvips/foreign/foreign.c
+++ b/libvips/foreign/foreign.c
@@ -698,6 +698,10 @@ vips_foreign_load_temp( VipsForeignLoad *load )
 		printf( "vips_foreign_load_temp: partial sequential temp\n" );
 #endif /*DEBUG*/
 
+		/* You can't reuse sequential operations.
+		 */
+		vips_operation_set_nocache( VIPS_OPERATION( load ), TRUE );
+
 		return( vips_image_new() );
 	}
 
@@ -927,6 +931,8 @@ vips_foreign_load_init( VipsForeignLoad *load )
 	load->disc = TRUE;
 }
 
+/* Make a sequential cache for a file reader. 
+ */
 int
 vips_foreign_tilecache( VipsImage *in, VipsImage **out, int strip_height )
 {
@@ -2153,19 +2159,10 @@ vips_fitssave( VipsImage *in, const char *filename, ... )
  *
  * Optional arguments:
  *
- * @sequential: sequential read only 
- *
  * Read a PNG file into a VIPS image. It can read all png images, including 8-
  * and 16-bit images, 1 and 3 channel, with and without an alpha channel.
  *
- * Setting @sequential to %TRUE means you promise to only demand tiles from
- * this image top-top-bottom, ie. to read sequentially. This means the png
- * loader can read directly from the image without having to generate a
- * random-access intermediate. This can save a lot of time and memory for
- * large images, but limits the sorts of operation you can perform. It's
- * useful for things like generating thumbnails. 
- *
- * There is no support for embedded ICC profiles.
+ * Any ICC profile is read and attached to the VIPS image.
  *
  * See also: vips_image_new_from_file().
  *
@@ -2204,7 +2201,9 @@ vips_pngload( const char *filename, VipsImage **out, ... )
  * than an interlaced PNG can be up to 7 times slower to write than a
  * non-interlaced image.
  *
- * There is no support for attaching ICC profiles to PNG images.
+ * If the VIPS header 
+ * contains an ICC profile named VIPS_META_ICC_NAME ("icc-profile-data"), the
+ * profile from the VIPS header will be attached.
  *
  * The image is automatically converted to RGB, RGBA, Monochrome or Mono +
  * alpha before saving. Images with more than one byte per band element are
diff --git a/libvips/foreign/tiff2vips.c b/libvips/foreign/tiff2vips.c
index 74b21428..5d3331b4 100644
--- a/libvips/foreign/tiff2vips.c
+++ b/libvips/foreign/tiff2vips.c
@@ -128,6 +128,13 @@
  * 18/2/12
  * 	- switch to sequential read
  * 	- remove the lock ... tilecache does this for us
+ * 3/6/12
+ * 	- always offer THINSTRIP ... later stages can ask for something more
+ * 	  relaxed if they wish
+ * 7/6/12
+ * 	- clip rows_per_strip down to image height to avoid overflows for huge
+ * 	  values (thanks Nicolas)
+ * 	- better error msg for not PLANARCONFIG_CONTIG images
  */
 
 /*
@@ -250,29 +257,6 @@ tfexists( TIFF *tif, ttag_t tag )
 		return( 0 );
 }
 
-/* Test a uint16 field. Field must be defined and equal to the value.
- */
-static int
-tfequals( TIFF *tif, ttag_t tag, uint16 val )
-{
-	uint16 fld;
-
-	if( !TIFFGetFieldDefaulted( tif, tag, &fld ) ) {
-		vips_error( "tiff2vips", 
-			_( "required field %d missing" ), tag );
-		return( 0 );
-	}
-	if( fld != val ) {
-		vips_error( "tiff2vips", _( "required field %d=%d, not %d" ),
-			tag, fld, val );
-		return( 0 );
-	}
-
-	/* All ok.
-	 */
-	return( 1 );
-}
-
 /* Get a uint32 field. 
  */
 static int
@@ -304,9 +288,26 @@ tfget16( TIFF *tif, ttag_t tag, int *out )
 		return( 0 );
 	}
 
-	/* All ok.
-	 */
 	*out = fld;
+
+	return( 1 );
+}
+
+/* Test a uint16 field. Field must be defined and equal to the value.
+ */
+static int
+tfequals( TIFF *tif, ttag_t tag, uint16 val )
+{
+	int v; 
+
+	if( !tfget16( tif, tag, &v ) )
+		return( 0 );
+	if( v != val ) {
+		vips_error( "tiff2vips", 
+			_( "required field %d = %d, not %d" ), tag, v, val );
+		return( 0 );
+	}
+
 	return( 1 );
 }
 
@@ -897,10 +898,16 @@ parse_header( ReadTiff *rtiff, VipsImage *out )
 
 	/* Ban separate planes, too annoying.
 	 */
-	if( tfexists( rtiff->tiff, TIFFTAG_PLANARCONFIG ) && 
-		!tfequals( rtiff->tiff, 
-			TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG ) ) 
-		return( -1 );
+	if( tfexists( rtiff->tiff, TIFFTAG_PLANARCONFIG ) ) {
+		int v; 
+
+		tfget16( rtiff->tiff, TIFFTAG_PLANARCONFIG, &v );
+		if( v != PLANARCONFIG_CONTIG ) {
+			vips_error( "tiff2vips",
+				"%s", _( "not a PLANARCONFIG_CONTIG image" ) );
+			return( -1 );
+		}
+	}
 
 	/* Always need dimensions.
 	 */
@@ -1090,6 +1097,12 @@ parse_header( ReadTiff *rtiff, VipsImage *out )
 			(VipsCallbackFn) vips_free, data_copy, data_length );
 	}
 
+	/* Offer the most restrictive style. This can be changed downstream if
+	 * necessary.
+	 */
+        vips_demand_hint( out, 
+		VIPS_DEMAND_STYLE_THINSTRIP, NULL );
+
 	return( 0 );
 }
 
@@ -1257,16 +1270,19 @@ read_tilewise( ReadTiff *rtiff, VipsImage *out )
 	if( parse_header( rtiff, raw ) )
 		return( -1 );
 
-	/* Process and save as VIPS.
+	/* Process and save as VIPS. 
+	 *
+	 * Even though this is a tiled reader, we hint thinstrip since with
+	 * the cache we are quite happy serving that if anything downstream 
+	 * would like it.
 	 */
         vips_demand_hint( raw, 
-		VIPS_DEMAND_STYLE_SMALLTILE, NULL );
+		VIPS_DEMAND_STYLE_THINSTRIP, NULL );
 	if( vips_image_generate( raw, 
 		tiff_seq_start, tiff_fill_region, tiff_seq_stop, 
 		rtiff, NULL ) )
 		return( -1 );
 
-
 	/* Copy to out, adding a cache. Enough tiles for two complete rows.
 	 */
 	if( vips_tilecache( raw, &t,
@@ -1335,8 +1351,8 @@ tiff2vips_stripwise_generate( VipsRegion *or,
 		/* If necessary, unpack to destination.
 		 */
 		if( !rtiff->memcpy ) {
-			int height = VIPS_MIN( rtiff->rows_per_strip,
-				or->im->Ysize - (r->top + y) );
+			int height = VIPS_MIN( VIPS_MIN( rtiff->rows_per_strip,
+				or->im->Ysize - (r->top + y) ), r->height );
 			int z;
 
 			for( z = 0; z < height; z++ ) { 
@@ -1386,6 +1402,11 @@ read_stripwise( ReadTiff *rtiff, VipsImage *out )
 	rtiff->strip_size = TIFFStripSize( rtiff->tiff );
 	rtiff->number_of_strips = TIFFNumberOfStrips( rtiff->tiff );
 
+	/* rows_per_strip can be 2**32-1, meaning the whole image. Clip this
+	 * down to ysize to avoid confusing vips. 
+	 */
+	rtiff->rows_per_strip = VIPS_MIN( rtiff->rows_per_strip, t[0]->Ysize );
+
 #ifdef DEBUG
 	printf( "read_stripwise: rows_per_strip = %u\n", 
 		rtiff->rows_per_strip );
diff --git a/libvips/foreign/vips2tiff.c b/libvips/foreign/vips2tiff.c
index 81920ade..116922b7 100644
--- a/libvips/foreign/vips2tiff.c
+++ b/libvips/foreign/vips2tiff.c
@@ -128,6 +128,9 @@
  * 	  VipsForeign class
  * 21/3/12
  * 	- bump max layer buffer up
+ * 2/6/12
+ * 	- copy jpeg pyramid in gather in RGB mode ... tiff4 doesn't do ycbcr
+ * 	  mode
  */
 
 /*
@@ -906,7 +909,8 @@ shrink_region( VipsRegion *from, VipsRect *area,
 /* Write a tile from a layer.
  */
 static int
-save_tile( TiffWrite *tw, TIFF *tif, VipsPel *tbuf, VipsRegion *reg, VipsRect *area )
+save_tile( TiffWrite *tw, 
+	TIFF *tif, VipsPel *tbuf, VipsRegion *reg, VipsRect *area )
 {
 	/* Have to repack pixels.
 	 */
@@ -1342,9 +1346,21 @@ tiff_copy( TiffWrite *tw, TIFF *out, TIFF *in )
 	/* TIFFTAG_JPEGQUALITY is a pesudo-tag, so we can't copy it.
 	 * Set explicitly from TiffWrite.
 	 */
-	if( tw->compression == COMPRESSION_JPEG ) 
+	if( tw->compression == COMPRESSION_JPEG ) {
 		TIFFSetField( out, TIFFTAG_JPEGQUALITY, tw->jpqual );
 
+		/* Enable rgb->ycbcr conversion in the jpeg write. See also
+		 * the photometric selection below.
+		 */
+		TIFFSetField( out, TIFFTAG_JPEGCOLORMODE, JPEGCOLORMODE_RGB );
+
+		/* And we want ycbcr expanded to rgb on read. Otherwise
+		 * TIFFTileSize() will give us the size of a chrominance
+		 * subsampled tile.
+		 */
+		TIFFSetField( in, TIFFTAG_JPEGCOLORMODE, JPEGCOLORMODE_RGB );
+	}
+
 	/* We can't copy profiles :( Set again from TiffWrite.
 	 */
 	if( embed_profile( tw, out ) )
@@ -1359,7 +1375,7 @@ tiff_copy( TiffWrite *tw, TIFF *out, TIFF *in )
 		 * here to save compression/decompression, but sadly it seems
 		 * not to work :-( investigate at some point.
 		 */
-		len = TIFFReadEncodedTile( in, tile, buf, (tsize_t) -1 );
+		len = TIFFReadEncodedTile( in, tile, buf, -1 );
 		if( len < 0 ||
 			TIFFWriteEncodedTile( out, tile, buf, len ) < 0 ) {
 			vips_free( buf );
@@ -1527,7 +1543,8 @@ vips__tiff_write( VipsImage *in, const char *filename,
 
 	/* Gather layers together into final pyramid file.
 	 */
-	if( tw->pyramid && gather_pyramid( tw ) ) {
+	if( tw->pyramid && 
+		gather_pyramid( tw ) ) {
 		free_tiff_write( tw );
 		return( -1 );
 	}
diff --git a/libvips/include/vips/operation.h b/libvips/include/vips/operation.h
index 4cf3cf40..e771c011 100644
--- a/libvips/include/vips/operation.h
+++ b/libvips/include/vips/operation.h
@@ -66,6 +66,12 @@ typedef struct _VipsOperation {
 	guint hash;
 	gboolean found_hash;
 
+	/* Set this before the end of _build() to stop this operation from 
+	 * being cached. Some things, like sequential read from a TIFF file, 
+	 * can't be reused.
+	 */
+	gboolean nocache;
+
 } VipsOperation;
 
 typedef struct _VipsOperationClass {
@@ -89,6 +95,7 @@ void vips_call_options( GOptionGroup *group, VipsOperation *operation );
 int vips_call_argv( VipsOperation *operation, int argc, char **argv );
 
 void vips_cache_drop_all( void );
+void vips_operation_set_nocache( VipsOperation *operation, gboolean nocache );
 int vips_cache_operation_buildp( VipsOperation **operation );
 VipsOperation *vips_cache_operation_build( VipsOperation *operation );
 void vips_cache_set_max( int max );
diff --git a/libvips/iofuncs/cache.c b/libvips/iofuncs/cache.c
index 8acb9923..67ea5273 100644
--- a/libvips/iofuncs/cache.c
+++ b/libvips/iofuncs/cache.c
@@ -621,7 +621,7 @@ vips_cache_operation_buildp( VipsOperation **operation )
 
 #ifdef VIPS_DEBUG
 	printf( "vips_cache_operation_build: " );
-	vips_object_print_summary_stdout( VIPS_OBJECT( *operation ) );
+	vips_object_print_dump( VIPS_OBJECT( *operation ) );
 #endif /*VIPS_DEBUG*/
 
 	vips_cache_init();
@@ -643,15 +643,22 @@ vips_cache_operation_buildp( VipsOperation **operation )
 	}
 	else {
 		if( vips__cache_trace ) {
-			printf( "vips cache: miss %p\n  ", *operation );
+			if( (*operation)->nocache ) 
+				printf( "vips cache: uncacheable %p\n  ", 
+					*operation );
+			else
+				printf( "vips cache: miss %p\n  ", *operation );
 			vips_object_print_summary( VIPS_OBJECT( *operation ) );
 		}
 
 		if( vips_object_build( VIPS_OBJECT( *operation ) ) )
 			return( -1 );
 
-		vips_cache_ref( *operation );
-		g_hash_table_insert( vips_cache_table, *operation, *operation );
+		if( !(*operation)->nocache ) {
+			vips_cache_ref( *operation );
+			g_hash_table_insert( vips_cache_table, 
+				*operation, *operation );
+		}
 	}
 
 	return( 0 );
diff --git a/libvips/iofuncs/operation.c b/libvips/iofuncs/operation.c
index 3422f7bb..52b469ec 100644
--- a/libvips/iofuncs/operation.c
+++ b/libvips/iofuncs/operation.c
@@ -949,3 +949,23 @@ vips_call_argv( VipsOperation *operation, int argc, char **argv )
 	return( 0 );
 }
 
+/**
+ * vips_operation_set_nocache: 
+ * @operation: operation to set
+ * @nocache: TRUE means don't cache this operation
+ *
+ * Set this before the end of _build() to stop this operation being cached.
+ * Some operations, like sequential read from a TIFF file, for example, cannot
+ * be reused.
+ */
+void 
+vips_operation_set_nocache( VipsOperation *operation, gboolean nocache )
+{
+#ifdef VIPS_DEBUG
+	printf( "vips_operation_set_nocache: " );
+	vips_object_print_name( VIPS_OBJECT( operation ) );
+	printf( " %d\n", nocache );
+#endif /*VIPS_DEBUG*/
+
+	operation->nocache = nocache;
+}
diff --git a/libvips/iofuncs/threadpool.c b/libvips/iofuncs/threadpool.c
index b7c78b64..37a3ef30 100644
--- a/libvips/iofuncs/threadpool.c
+++ b/libvips/iofuncs/threadpool.c
@@ -121,6 +121,19 @@ void vips__g_mutex_lock( GMutex *d ) {}
 void vips__g_mutex_unlock( GMutex *d ) {}
 #endif /*!HAVE_THREADS*/
 
+/**
+ * vips_concurrency_set:
+ * @concurrency: number of threads to run
+ *
+ * Sets the number of worker threads that vips should use when running a
+ * #VipsThreadPool. 
+ *
+ * The special value 0 means "default". In this case, the number of threads is
+ * set by the environmnt variable IM_CONCURRENCY, or if that is not set, the
+ * number of threads availble on the hist machine. 
+ *
+ * See also: vips_concurrency_get().
+ */
 void
 vips_concurrency_set( int concurrency )
 {
@@ -190,8 +203,29 @@ get_num_processors( void )
 	return( nproc );
 }
 
-/* Set (p)thr_concurrency() from IM_CONCURRENCY environment variable. Return 
- * the number of regions we should pass over the image.
+/**
+ * vips_concurrency_get:
+ *
+ * Returns the number of worker threads that vips should use when running a
+ * #VipsThreadPool. 
+ *
+ * vips gets this values from these sources in turn:
+ *
+ * If vips_concurrency_set() has been called, this value is used. The special
+ * value 0 means "default". You can also use the command-line argument
+ * "--vips-concurrency" to set this value.
+ *
+ * If vips_concurrency_set() has not been called and no command-line argument
+ * was used, vips uses the value of the environment variable IM_CONCURRENCY,
+ *
+ * If IM_CONCURRENCY has not been set, vips find the number of hardware
+ * threads that the host machine can run in parallel and uses that value. 
+ *
+ * The final value is clipped to the range 1 - 1024.
+ *
+ * See also: vips_concurrency_get().
+ *
+ * Returns: number of worker threads to use.
  */
 int
 vips_concurrency_get( void )
diff --git a/libvips/resample/im_shrink.c b/libvips/resample/im_shrink.c
index 98d53d85..ecb9fedb 100644
--- a/libvips/resample/im_shrink.c
+++ b/libvips/resample/im_shrink.c
@@ -58,6 +58,10 @@
 
  */
 
+/*
+#define DEBUG
+ */
+
 #ifdef HAVE_CONFIG_H
 #include <config.h>
 #endif /*HAVE_CONFIG_H*/
@@ -244,6 +248,11 @@ shrink_gen( REGION *or, void *vseq, void *a, void *b )
 
 	int x, y;
 
+#ifdef DEBUG
+	printf( "shrink_gen: generating %d x %d at %d x %d\n",
+		r->width, r->height, r->left, r->top ); 
+#endif /*DEBUG*/
+
 	for( y = 0; y < r->height; y += ystep )  
 		for( x = 0; x < r->width; x += xstep ) { 
 			/* Clip the this rect against the demand size.
@@ -257,6 +266,10 @@ shrink_gen( REGION *or, void *vseq, void *a, void *b )
 			s.top = (r->top + y) * st->yshrink;
 			s.width = 1 + ceil( width * st->xshrink );
 			s.height = 1 + ceil( height * st->yshrink );
+#ifdef DEBUG
+			printf( "shrink_gen: requesting %d x %d at %d x %d\n",
+				s.width, s.height, s.left, s.top ); 
+#endif /*DEBUG*/
 			if( im_prepare( ir, &s ) )
 				return( -1 );
 
diff --git a/po/vips7.pot b/po/vips7.pot
index d106f887..db828e52 100644
--- a/po/vips7.pot
+++ b/po/vips7.pot
@@ -799,7 +799,7 @@ msgid "factors should both be >= 1"
 msgstr ""
 
 #: ../libvips/conversion/im_subsample.c:221
-#: ../libvips/resample/im_shrink.c:286
+#: ../libvips/resample/im_shrink.c:299
 msgid "image has shrunk to nothing"
 msgstr ""
 
@@ -1429,7 +1429,7 @@ msgstr ""
 msgid "error reading radiance header"
 msgstr ""
 
-#: ../libvips/foreign/radiance.c:959 ../libvips/foreign/tiff2vips.c:1331
+#: ../libvips/foreign/radiance.c:959 ../libvips/foreign/tiff2vips.c:1343
 msgid "read error"
 msgstr ""
 
@@ -1709,91 +1709,91 @@ msgstr ""
 msgid "EXR error: %s"
 msgstr ""
 
-#: ../libvips/foreign/tiff2vips.c:262 ../libvips/foreign/tiff2vips.c:285
-#: ../libvips/foreign/tiff2vips.c:303
+#: ../libvips/foreign/tiff2vips.c:265 ../libvips/foreign/tiff2vips.c:288
+#: ../libvips/foreign/tiff2vips.c:306
 #, c-format
 msgid "required field %d missing"
 msgstr ""
 
-#: ../libvips/foreign/tiff2vips.c:266
+#: ../libvips/foreign/tiff2vips.c:269
 #, c-format
 msgid "required field %d=%d, not %d"
 msgstr ""
 
-#: ../libvips/foreign/tiff2vips.c:650
+#: ../libvips/foreign/tiff2vips.c:653
 #, c-format
 msgid "%d bits per sample palette image not supported"
 msgstr ""
 
-#: ../libvips/foreign/tiff2vips.c:659
+#: ../libvips/foreign/tiff2vips.c:662
 msgid "bad colormap"
 msgstr ""
 
-#: ../libvips/foreign/tiff2vips.c:716 ../libvips/foreign/tiff2vips.c:747
+#: ../libvips/foreign/tiff2vips.c:719 ../libvips/foreign/tiff2vips.c:750
 msgid "3 or 4 bands RGB TIFF only"
 msgstr ""
 
-#: ../libvips/foreign/tiff2vips.c:818
+#: ../libvips/foreign/tiff2vips.c:821
 msgid "4 or 5 bands CMYK TIFF only"
 msgstr ""
 
-#: ../libvips/foreign/tiff2vips.c:869
+#: ../libvips/foreign/tiff2vips.c:872
 msgid "unknown resolution unit"
 msgstr ""
 
-#: ../libvips/foreign/tiff2vips.c:874
+#: ../libvips/foreign/tiff2vips.c:877
 #, c-format
 msgid ""
 "no resolution information for TIFF image \"%s\" -- defaulting to 1 pixel per "
 "mm"
 msgstr ""
 
-#: ../libvips/foreign/tiff2vips.c:946
+#: ../libvips/foreign/tiff2vips.c:949
 #, c-format
 msgid "unsupported sample format %d for lab image"
 msgstr ""
 
-#: ../libvips/foreign/tiff2vips.c:956
+#: ../libvips/foreign/tiff2vips.c:959
 #, c-format
 msgid "unsupported depth %d for LAB image"
 msgstr ""
 
-#: ../libvips/foreign/tiff2vips.c:995
+#: ../libvips/foreign/tiff2vips.c:998
 #, c-format
 msgid "unsupported sample format %d for greyscale image"
 msgstr ""
 
-#: ../libvips/foreign/tiff2vips.c:1004
+#: ../libvips/foreign/tiff2vips.c:1007
 #, c-format
 msgid "unsupported depth %d for greyscale image"
 msgstr ""
 
-#: ../libvips/foreign/tiff2vips.c:1052
+#: ../libvips/foreign/tiff2vips.c:1055
 #, c-format
 msgid "unsupported sample format %d for rgb image"
 msgstr ""
 
-#: ../libvips/foreign/tiff2vips.c:1061
+#: ../libvips/foreign/tiff2vips.c:1064
 #, c-format
 msgid "unsupported depth %d for RGB image"
 msgstr ""
 
-#: ../libvips/foreign/tiff2vips.c:1075
+#: ../libvips/foreign/tiff2vips.c:1078
 #, c-format
 msgid "unknown photometric interpretation %d"
 msgstr ""
 
-#: ../libvips/foreign/tiff2vips.c:1444
+#: ../libvips/foreign/tiff2vips.c:1456
 #, c-format
 msgid "bad page number %d"
 msgstr ""
 
-#: ../libvips/foreign/tiff2vips.c:1465 ../libvips/foreign/vips2tiff.c:286
+#: ../libvips/foreign/tiff2vips.c:1477 ../libvips/foreign/vips2tiff.c:289
 #, c-format
 msgid "unable to open \"%s\" for input"
 msgstr ""
 
-#: ../libvips/foreign/tiff2vips.c:1520 ../libvips/foreign/tiff2vips.c:1550
+#: ../libvips/foreign/tiff2vips.c:1532 ../libvips/foreign/tiff2vips.c:1562
 #, c-format
 msgid "TIFF file does not contain page %d"
 msgstr ""
@@ -1932,44 +1932,44 @@ msgstr ""
 msgid "save image to png buffer"
 msgstr ""
 
-#: ../libvips/foreign/vips2tiff.c:270
+#: ../libvips/foreign/vips2tiff.c:273
 #, c-format
 msgid "unable to open \"%s\" for output"
 msgstr ""
 
-#: ../libvips/foreign/vips2tiff.c:692
+#: ../libvips/foreign/vips2tiff.c:695
 msgid "layer buffer exhausted -- try making TIFF output tiles smaller"
 msgstr ""
 
-#: ../libvips/foreign/vips2tiff.c:922
+#: ../libvips/foreign/vips2tiff.c:926
 msgid "TIFF write tile failed"
 msgstr ""
 
-#: ../libvips/foreign/vips2tiff.c:998
+#: ../libvips/foreign/vips2tiff.c:1002
 msgid "internal error #9876345"
 msgstr ""
 
-#: ../libvips/foreign/vips2tiff.c:1251
+#: ../libvips/foreign/vips2tiff.c:1255
 msgid "tile size not a multiple of 16"
 msgstr ""
 
-#: ../libvips/foreign/vips2tiff.c:1257
+#: ../libvips/foreign/vips2tiff.c:1261
 msgid "can't have strip pyramid -- enabling tiling"
 msgstr ""
 
-#: ../libvips/foreign/vips2tiff.c:1268
+#: ../libvips/foreign/vips2tiff.c:1272
 msgid "can only pyramid LABQ and non-complex images"
 msgstr ""
 
-#: ../libvips/foreign/vips2tiff.c:1285
+#: ../libvips/foreign/vips2tiff.c:1289
 msgid "can't have 1-bit JPEG -- disabling JPEG"
 msgstr ""
 
-#: ../libvips/foreign/vips2tiff.c:1463
+#: ../libvips/foreign/vips2tiff.c:1479
 msgid "unsigned 8-bit int, 16-bit int, and 32-bit float only"
 msgstr ""
 
-#: ../libvips/foreign/vips2tiff.c:1470
+#: ../libvips/foreign/vips2tiff.c:1486
 msgid "1 to 5 bands only"
 msgstr ""
 
@@ -2237,7 +2237,7 @@ msgstr ""
 msgid "usage:"
 msgstr ""
 
-#: ../libvips/iofuncs/operation.c:287 ../libvips/iofuncs/object.c:1248
+#: ../libvips/iofuncs/operation.c:287 ../libvips/iofuncs/object.c:1239
 #: ../libvips/resample/interpolate.c:615
 #, c-format
 msgid "class \"%s\" not found"
@@ -2897,56 +2897,56 @@ msgstr ""
 msgid "parameter %s not set"
 msgstr ""
 
-#: ../libvips/iofuncs/object.c:505
+#: ../libvips/iofuncs/object.c:500
 #, c-format
 msgid "no property named `%s'"
 msgstr ""
 
-#: ../libvips/iofuncs/object.c:513
+#: ../libvips/iofuncs/object.c:508
 #, c-format
 msgid "no vips argument named `%s'"
 msgstr ""
 
-#: ../libvips/iofuncs/object.c:520
+#: ../libvips/iofuncs/object.c:515
 #, c-format
 msgid "argument `%s' has no instance"
 msgstr ""
 
-#: ../libvips/iofuncs/object.c:1297
+#: ../libvips/iofuncs/object.c:1288
 msgid "base class"
 msgstr ""
 
-#: ../libvips/iofuncs/object.c:1311
+#: ../libvips/iofuncs/object.c:1302
 msgid "Nickname"
 msgstr ""
 
-#: ../libvips/iofuncs/object.c:1312
+#: ../libvips/iofuncs/object.c:1303
 msgid "Class nickname"
 msgstr ""
 
-#: ../libvips/iofuncs/object.c:1318
+#: ../libvips/iofuncs/object.c:1309
 msgid "Description"
 msgstr ""
 
-#: ../libvips/iofuncs/object.c:1319
+#: ../libvips/iofuncs/object.c:1310
 msgid "Class description"
 msgstr ""
 
-#: ../libvips/iofuncs/object.c:1509
+#: ../libvips/iofuncs/object.c:1537
 #, c-format
 msgid "enum '%s' has no member '%s'"
 msgstr ""
 
-#: ../libvips/iofuncs/object.c:1769
+#: ../libvips/iofuncs/object.c:1797
 #, c-format
 msgid "unable to set '%s'"
 msgstr ""
 
-#: ../libvips/iofuncs/object.c:1777
+#: ../libvips/iofuncs/object.c:1805
 msgid "not , or ) after parameter"
 msgstr ""
 
-#: ../libvips/iofuncs/object.c:1784
+#: ../libvips/iofuncs/object.c:1812
 msgid "extra tokens after ')'"
 msgstr ""
 
@@ -3143,7 +3143,7 @@ msgstr ""
 msgid "factor should be in [1,0)"
 msgstr ""
 
-#: ../libvips/resample/im_shrink.c:346
+#: ../libvips/resample/im_shrink.c:359
 msgid "shrink factors should be >= 1"
 msgstr ""