Just got the GIMP 2.8.8 update in Fedora.

Here are the changes from the official change log.
Overview of Changes from GIMP 2.8.6 to GIMP 2.8.8
=================================================
Core:
- Make sure indexed images always have a colormap
- Fix language selection via preferences on Windows
- Don't crash on setting a large text size
GUI:
- Keep the same image active when switching between MWM and SWM
- Make sure all dockables are properly resizable (particularly shrinkable) (yay!!!)
- Add links to jump directly to Save/Export from the Export/Save file extension warning dialogs
Libgimp:
- Fix GimpPickButton on OSX
Plug-ins:
- Properly document plug-in-autocrop-layer's PDB interface
- Fix importing of indexed BMPs
General:
- Fix lots of places to use GIO to get proper file sizes and times on windows
- Add an AppData file for GIMP
- Backport lcms2 support from master, because lcms1 is not getting bug fixes any longer
- Lots of bug fixes
- Lots of translation updates
Looks great!
Fedora 18 (and above) users can grab the new GIMP version from the updates-testing repository.
yum --enablerepo=updates-testing update gimp