Turns out the fix is pretty simple. Just open up a terminal and type:
(ccsm:8581): Gtk-WARNING **: Locale not supported by C library. Using the fallback 'C' locale. Info: No sexy-python package found, don't worry it's optional. Traceback (most recent call last): File "/usr/bin/ccsm", line 38, in
import ccm File "/usr/lib/python2.5/site-packages/ccm/__init__.py", line 1, in from ccm.Conflicts import * File "/usr/lib/python2.5/site-packages/ccm/Conflicts.py", line 26, in from ccm.Constants import * File "/usr/lib/python2.5/site-packages/ccm/Constants.py", line 72, in locale.setlocale(locale.LC_ALL, "") File "/usr/lib/python2.5/locale.py", line 476, in setlocale return _setlocale(category, locale) locale.Error: unsupported locale setting
one after another.
Unfortunately, this fix doesn't seem to stick, so you have to do it every time you want to launch.