Ever since a fresh install this month (11.10 x64) I've been having weird issues with the language settings.

I use ibus to switch between English and Japanese IME.

Now, seemingly at random, the IME switches between the languages. Often this happens mid-sentence, switching the languages. There isn't a specific keystroke combination that sets this off -- it's entirely random.

This never happened before with 11.10 or earlier versions. I'm not sure what set this off, but any ideas?