Last modified: 2009-06-03 09:38:56 UTC
When language is switched, the current date&time option may not exists for the new language. Thus nothing is selected and saving preferences is interrupted with "There was a problem with your input". In addition user needs to go trough all the tabs to find the problematic option (and there is no clue that more information is *somewhere*). Work-around is easy, but the problem is hard to recognise.
Should be fixed as of r51395.