New GIMP 2.8.4: featuring lots of bug fixes and translation updates.
Pending the Pre-built binaries for Mac, since February, 05, 2013 GIMP 2.8.4 is ready.
In fact GIMP 2.8.4 is a
release in the stable GIMP 2.8 series featuring lots of bug fixes and
translation updates.
Therefore the overview of changes from GIMP 2.8.2 to
GIMP 2.8.4 includes: 
 - Move the OSX
gimpdir to "~/Library/Application Support"
GUI:
 - Better names
for the default filters in save and export
 - Make tool
drawing (esp. the brush outline) much more responsive
 - Remember the
"maximized" state across sessions
 - Simplify the
splash image code a lot, makes it appear immediately again
 - Allow the
text tool to start on an image without layers
 - Various fixes
for text style attribute handling
 - Set
unconfigured input devices to eraser if GTK+ says they are erasers
 - Make language
selectable in Preferences on OSX
Libgimp:
 - Make libgimp drawable
combo boxes aware of layer groups
 - Make sure
plug-in windows appear on top on OSX
 - Fix item
width in GimpPageSelector (used e.g. in PDF import)
Plug-ins:
 - Better
default values in the Drop Shadow script
 - Fix a whole
bunch of bugs in the BMP plug-in
 - On OSX, use
the system's screenshot utility
Installer:
 - Add
Brazilian-Portuguese translation to the Windows installer
Source and build system:
 - Many
improvements to the OSX bundle build system
 - Support
automake 1.13