diff --git a/ChangeLog b/ChangeLog
index 95dcf7ca..f4593823 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -8,6 +8,9 @@
 - vipsthumbnail no longer removes profiles by default
 - much more gentle sharpening in thumbnails
 
+18/6/12 started 7.28.9
+- slightly more memory debugging output
+
 18/6/12 started 7.28.8
 - fixes for centos5 portability
 
diff --git a/libvips/iofuncs/image.c b/libvips/iofuncs/image.c
index bb61abce..40096468 100644
--- a/libvips/iofuncs/image.c
+++ b/libvips/iofuncs/image.c
@@ -414,6 +414,8 @@ vips_image_summary( VipsObject *object, VipsBuf *buf )
 			vips_enum_nick( VIPS_TYPE_CODING, 
 				vips_image_get_coding( image ) ) );
 	}
+	vips_buf_appendf( buf, ", %s", 
+		vips_enum_nick( VIPS_TYPE_IMAGE_TYPE, image->dtype ) );
 
 	VIPS_OBJECT_CLASS( vips_image_parent_class )->summary( object, buf );
 }
diff --git a/libvips/iofuncs/region.c b/libvips/iofuncs/region.c
index 1134ab48..f192e115 100644
--- a/libvips/iofuncs/region.c
+++ b/libvips/iofuncs/region.c
@@ -323,6 +323,9 @@ vips_region_summary( VipsObject *object, VipsBuf *buf )
 	vips_buf_appendf( buf, "width = %d, ", region->valid.width );
 	vips_buf_appendf( buf, "height = %d", region->valid.height );
 
+	if( region->buffer && region->buffer->buf )
+		vips_buf_appendf( buf, ", bytes = %zd", region->buffer->bsize );
+
 	VIPS_OBJECT_CLASS( vips_region_parent_class )->summary( object, buf );
 }