diff --git a/TODO b/TODO
index 474ae19d..f717cb21 100644
--- a/TODO
+++ b/TODO
@@ -3,6 +3,8 @@
 
 	- update examples with new image constant rules
 
+		update blog post with new examples/try12.py
+
 	- do more tests
 
 - put exif autorotate into jpeg load
@@ -15,17 +17,12 @@
 
 - vips_resize() should use vipsthumbnail's block/cache/affine/sharpen chain
 
-- vips_object_unref_outputs() needs docs ... bindings will need it
- 
-- rewrite im_conv() etc. as vips_conv()
+- fix up aconv
+
+- rewrite im_conv() etc. as vips_conv(), also the mosaicing functions
 
   finally finish --disable-deprecated option
 
-- vips_object_unref_outputs() needs docs ... bindings will need it
- 
-- where should we explain VIPS_IMAGE_ADDR(), VIPS_REGION_ADDR(),
-  vips_region_region() etc.?
-
 
 
 - check and fix up docs
diff --git a/libvips/iofuncs/object.c b/libvips/iofuncs/object.c
index 30664050..d012c0e5 100644
--- a/libvips/iofuncs/object.c
+++ b/libvips/iofuncs/object.c
@@ -2954,12 +2954,18 @@ vips_object_unref_outputs_sub( VipsObject *object,
 	return( NULL );
 }
 
-/* Unref all assigned output objects.
+/**
+ * vips_object_unref_outputs:
+ * @object: object to drop output refs from
+ *
+ * Unref all assigned output objects. Useful for language bindings. 
  *
  * After an object is built, all output args are owned by the caller. If
  * something goes wrong before then, we have to unref the outputs that have
- * been made so far. And this function can also be useful for callers when
+ * been made so far. This function can also be useful for callers when
  * they've finished processing outputs themselves.
+ *
+ * See also: vips_cache_operation_build().
  */
 void
 vips_object_unref_outputs( VipsObject *object )
diff --git a/python/example/try12.py b/python/example/try12.py
index 363ddaf0..9f5c58f7 100755
--- a/python/example/try12.py
+++ b/python/example/try12.py
@@ -6,14 +6,12 @@ from gi.repository import Vips
 
 im = Vips.Image.new_from_file(sys.argv[1], access = Vips.Access.SEQUENTIAL)
 
-black = Vips.Image.black(im.width, 150)
-red = (black + [255, 0, 0]).cast(Vips.BandFormat.UCHAR)
+footer = Vips.Image.black(im.width, 150)
 left_text = Vips.Image.text("left corner", dpi = 300)
 right_text = Vips.Image.text("right corner", dpi = 300)
-
-left = left_text.embed(50, 50, im.width, 150)
-right = right_text.embed(im.width - right_text.width - 50, 50, im.width, 150)
-footer = (left | right).ifthenelse(black, red, blend = True)
+footer = footer.insert(left_text, 50, 50)
+footer = footer.insert(right_text, im.width - right_text.width - 50, 50)
+footer = footer.ifthenelse(0, [255, 0, 0], blend = True)
 
 im = im.insert(footer, 0, im.height, expand = True)
 
diff --git a/python/test/test_overrides.py b/python/test/test_overrides.py
deleted file mode 100644
index 55da3540..00000000
--- a/python/test/test_overrides.py
+++ /dev/null
@@ -1,13 +0,0 @@
-#!/usr/bin/python
-
-import unittest
-import math
-
-#import logging
-#logging.basicConfig(level = logging.DEBUG)
-
-from gi.repository import Vips 
-
-class TestOverrides(unittest.TestCase):
-
-