Last modified: 2011-01-14 15:42:13 UTC
Go to an URL with a movie that has subtitles in the interface language defined in your preferences. Start playing. The subtitles won't appear. Click the CC button. The subtitles will appear even before you select the language. On Firefox 3.6 they appear immediately without clicking any buttons and i suppose that that is the desired behavior.
Thanks for the bug report. Was an issue of event prorogation handled slightly differently in firefox 4, made things work more consistently in r80273 Update should be pushed out later today.