diff --git a/TODO b/TODO
index 61ab3cab..a5d9d939 100644
--- a/TODO
+++ b/TODO
@@ -1,9 +1,17 @@
 - fix --vips-progress for dzsave
 
+  _set_progress(FALSE) on an image upstream of the tile isn't going to help,
+  we attach callbacks to all images if --vips-progress is on
+
+  on set_progress(FALSE) vips_sink_disc() should stop calling
+  vips_image_preeval()
+
 - rewrite vips.1 manpage
 
 - remove -c abbrev. for --vips-concurrency
 
+- threadpool recyling might be useful for dzsave?
+
 
 
 
diff --git a/libvips/iofuncs/image.c b/libvips/iofuncs/image.c
index 7986b462..ecca301f 100644
--- a/libvips/iofuncs/image.c
+++ b/libvips/iofuncs/image.c
@@ -1522,7 +1522,8 @@ vips_image_posteval( VipsImage *image )
 void
 vips_image_set_progress( VipsImage *image, gboolean progress )
 {
-	if( progress && !image->progress_signal ) {
+	if( progress && 
+		!image->progress_signal ) {
 		VIPS_DEBUG_MSG( "vips_image_set_progress: %p %s\n", 
 			image, image->filename );
 		image->progress_signal = image;