diff --git a/TODO b/TODO
index 67e7e5d8..e9caa6d2 100644
--- a/TODO
+++ b/TODO
@@ -1,3 +1,15 @@
+- affine makes black lines with interp window_offset > 1, see nohalo
+
+- get rid of libexif, try exiv2
+
+- experiment with size down to two sizes above in vipsthumbnail
+
+  how does this affect speed and sharpness?
+
+- vipsthumbnail -t plus large -s seems to fail?
+
+
+
 - vips_object_unref_outputs() needs docs ... bindings will need it