Getting a problem with Cardapio and Gajim, won't launch due to a locale problem?

Question

After an update yesterday, every time I try to run gajim or cardapio, this is what I get:

(process:10142): Gtk-WARNING **: Locale not supported by C library. Using the fallback 'C' locale.

I tried reinstalling cardapio and I'm still getting the problem. Since both are written in python I was guessing it must be a problem with python but I can't see which update could have caused this problem. I'm at a loss as to what to do, since nothing in my searching has proven useful (a bunch of unanswered forum posts for what seems to be a similar, but non-fatal error).

EDIT: After following this answer locale problem when running xterm in Ubuntu 10.04, I am still at a loss as to a fix. I can launch the applications with LANG=C, but, I don't quite get how to make that default (if this is needed).

EDIT#2 In seeking a solution, I tried to run clicompanion, and this is what I get: Traceback (most recent call last): File "/usr/bin/clicompanion", line 27, in <module> idioma = get_language() File "/usr/bin/clicompanion", line 18, in get_language loc = locale.setlocale(locale.LC_ALL, "") File "/usr/lib/python2.6/locale.py", line 513, in setlocale return _setlocale(category, locale) locale.Error: unsupported locale setting

Answer 1

Not 100% sure what in my sequence fixed the problem, but nothing I tried worked - until:

• I reinstalled the locales (language-support-*)
  • This did not fix the problem, as far as I could tell, but at this point I had not logged out.
• Logged out, logged in without changing anything.
  • this did not fix the problem, it would seem, as I still got an error.
• I logged out, changed the language I was logging in with, and logged into the recovery console to test again.
  • Somehow the problem seems to have fixed itself.