diff --git a/TODO b/TODO
index 7e0e5607..84791ff5 100644
--- a/TODO
+++ b/TODO
@@ -1,21 +1,3 @@
-- relational/video still to do
-
-- built with O2, experiment with 
-
-    - floorf()
-    - try commenting out the thing that calculates cardinal_one etc. to get
-	an idea of the possible speedup with LUTs
-    - time for uchar vs. vips-bilinear and new bilinear and float yafr
-    - can we build and time gegl?
-
-
-  add a vips_interpolate_get_method() which returns the function pointer, use
-  that in the inner loop instead of function dispatch
-
-  done ... try editing im_affinei and time
-
-
-
 - vips_object_print, set_name etc. need writing
 
 - im_buf_t -> VipsBuf
diff --git a/libsrc/relational/im_blend.c b/libsrc/relational/im_blend.c
index 5463a1aa..b7639fb7 100644
--- a/libsrc/relational/im_blend.c
+++ b/libsrc/relational/im_blend.c
@@ -327,24 +327,25 @@ im_blend( IMAGE *c, IMAGE *a, IMAGE *b, IMAGE *out )
 	 */
         if( a->Coding != IM_CODING_NONE || b->Coding != IM_CODING_NONE ||
 		c->Coding != IM_CODING_NONE ) {
-                im_error( "im_blend", _( "images not uncoded" ) );
+                im_error( "im_blend", "%s", _( "images not uncoded" ) );
                 return( -1 );
         }
 	if( a->BandFmt != b->BandFmt ||
 		a->Bands != b->Bands ) {
 		im_error( "im_blend", 
-			_( "size and format of then and else must match" ) );
+			"%s", _( "size and format of then and else "
+			"must match" ) );
 		return( -1 );
 	}
 	if( c->BandFmt != IM_BANDFMT_UCHAR ) {
 		im_error( "im_blend", 
-			_( "conditional image must be uchar" ) );
+			"%s", _( "conditional image must be uchar" ) );
 		return( -1 );
 	}
 	if( c->Bands != 1 && c->Bands != a->Bands ) {
 		im_error( "im_blend", 
-			_( "conditional image must be one band or same as "
-			"then and else images" ) );
+			"%s", _( "conditional image must be one band or "
+			"same as then and else images" ) );
 		return( -1 );
 	}
         if( im_piocheck( c, out ) || im_pincheck( a ) || im_pincheck( b ) )
diff --git a/libsrc/relational/im_ifthenelse.c b/libsrc/relational/im_ifthenelse.c
index 5f70d954..9eb01cb4 100644
--- a/libsrc/relational/im_ifthenelse.c
+++ b/libsrc/relational/im_ifthenelse.c
@@ -167,34 +167,35 @@ im_ifthenelse( IMAGE *c, IMAGE *a, IMAGE *b, IMAGE *out )
 	 */
 	if( a->Coding != IM_CODING_NONE && a->Coding != IM_CODING_LABQ ) {
 		im_error( "im_ifthenelse", 
-			_( "then image must be uncoded or labpack" ) );
+			"%s", _( "then image must be uncoded or labpack" ) );
 		return( -1 );
 	}
 	if( b->Coding != IM_CODING_NONE && b->Coding != IM_CODING_LABQ ) {
 		im_error( "im_ifthenelse", 
-			_( "else image must be uncoded or labpack" ) );
+			"%s", _( "else image must be uncoded or labpack" ) );
 		return( -1 );
 	}
 	if( c->Coding != IM_CODING_NONE ) {
 		im_error( "im_ifthenelse", 
-			_( "condition image must be uncoded" ) );
+			"%s", _( "condition image must be uncoded" ) );
 		return( -1 );
 	}
 	if( a->BandFmt != b->BandFmt ||
 		a->Bands != b->Bands ) {
 		im_error( "im_ifthenelse", 
-			_( "size and format of then and else must match" ) );
+			"%s", _( "size and format of then and else "
+			"must match" ) );
 		return( -1 );
 	}
 	if( c->BandFmt != IM_BANDFMT_UCHAR ) {
 		im_error( "im_ifthenelse", 
-			_( "conditional image must be uchar" ) );
+			"%s", _( "conditional image must be uchar" ) );
 		return( -1 );
 	}
 	if( c->Bands != 1 && c->Bands != a->Bands ) {
 		im_error( "im_ifthenelse", 
-			_( "conditional image must be one band or same as "
-			"then and else images" ) );
+			"%s", _( "conditional image must be one band or same "
+			"as then and else images" ) );
 		return( -1 );
 	}
 
diff --git a/libsrc/video/im_video_test.c b/libsrc/video/im_video_test.c
index b2144f2a..31f81e53 100644
--- a/libsrc/video/im_video_test.c
+++ b/libsrc/video/im_video_test.c
@@ -42,7 +42,7 @@ int
 im_video_test( IMAGE *im, int brightness, int error )
 {
 	if( error ) {
-		im_error( "im_video_test", _( "error requested" ) );
+		im_error( "im_video_test", "%s", _( "error requested" ) );
 		return( -1 );
 	}
 	else
diff --git a/libsrc/video/im_video_v4l1.c b/libsrc/video/im_video_v4l1.c
index 4f846fee..112d86b6 100644
--- a/libsrc/video/im_video_v4l1.c
+++ b/libsrc/video/im_video_v4l1.c
@@ -243,7 +243,7 @@ static int
 lgrab_ioctl( LGrab *lg, int request, void *argp )
 {
 	if( !lg->fd ) {
-		im_error( "lgrab_ioctl", _( "no file descriptor" ) );
+		im_error( "lgrab_ioctl", "%s", _( "no file descriptor" ) );
 		return( -1 );
 	}
 
@@ -304,7 +304,8 @@ lgrab_new( const char *device )
 	}
 
         if( lgrab_ioctl( lg, VIDIOCGCAP, &lg->capability ) ) {
-		im_error( "lgrab_new", _( "cannot get video capability" ) );
+		im_error( "lgrab_new", 
+			"%s", _( "cannot get video capability" ) );
 		lgrab_destroy( lg );
 		return( NULL );
 	}
@@ -312,7 +313,8 @@ lgrab_new( const char *device )
         /* Check that it can capture to memory.
 	 */
         if( !(lg->capability.type & VID_TYPE_CAPTURE) ) {
-                im_error( "lgrab_new", _( "card cannot capture to memory" ) );
+                im_error( "lgrab_new", 
+			"%s", _( "card cannot capture to memory" ) );
 		lgrab_destroy( lg );
 		return( NULL );
 	}
@@ -458,7 +460,7 @@ lgrab_set_capture_size( LGrab *lg, int width, int height )
 	if( !(lg->capture_buffer = mmap( 0, lg->capture_size, 
 		PROT_READ | PROT_WRITE, MAP_SHARED, lg->fd, 0 )) ) {
 		im_error( "lgrab_set_capture_size", 
-			_( "unable to map memory" ) );
+			"%s", _( "unable to map memory" ) );
 		return( -1 );
 	}
 
@@ -670,7 +672,7 @@ im_video_v4l1( IMAGE *im, const char *device,
 	int ngrabs )
 {
 	im_error( "im_video_v4l1", 
-		_( "compiled without im_video_v4l1 support" ) );
+		"%s", _( "compiled without im_video_v4l1 support" ) );
 	return( -1 );
 }
 
diff --git a/src/iofuncs/edvips.c b/src/iofuncs/edvips.c
index 7aa73200..137acf3e 100644
--- a/src/iofuncs/edvips.c
+++ b/src/iofuncs/edvips.c
@@ -119,7 +119,7 @@ main( int argc, char **argv )
 	unsigned char header[IM_SIZEOF_HEADER];
 
 	if( im_init_world( argv[0] ) )
-	        error_exit( _( "unable to start VIPS" ) );
+	        error_exit( "%s", _( "unable to start VIPS" ) );
 
 	context = g_option_context_new( 
 		_( "vipsfile - edit vipsfile header" ) );
@@ -186,7 +186,7 @@ main( int argc, char **argv )
 		unsigned int size;
 
 		if( !(xml = im__file_read( stdin, "stdin", &size )) )
-			error_exit( _( "could not get ext data" ) );
+			error_exit( "%s", _( "could not get ext data" ) );
 
 		/* Strip trailing whitespace ... we can get stray \n at the 
 		 * end, eg. "echo | edvips --setext fred.v".
@@ -195,7 +195,7 @@ main( int argc, char **argv )
 			size -= 1;
 
 		if( im__write_extension_block( im, xml, size ) )
-			error_exit( _( "could not set extension" ) );
+			error_exit( "%s", _( "could not set extension" ) );
 		im_free( xml );
 	}