GIMP 2.4.0-RC2 is finally there. The developers have fixed quite some bugs since RC1 but it's not the final thing yet.

Changes in GIMP 2.4.0-rc2
=========================

- more improvements and bug fixes in the rectangle tools
- antialias the display for zoom levels between 100% and 200%
- fix zoomed-out display problems
- improve handling of JPEG settings
- fix script-fu error reporting
- on OS X, get rid of menubars in windows and use the global menubar
- fix plug-ins using GimpZoomPreview
- throw properly catchable exceptions from foreign script-fu function
(like PDB wrappers)
- bug fixes

http://www.gimp.org/