[@andreioniga Member 14 years, 9 months ago]

I’ve managed to find the problem eventually, and it was not bbPress-related, but caused by qTranslate (multi-language support plugin) actually.

In case anyone comes across the same problem with the date, check this post out: http://www.qianqin.de/qtranslate/forum/viewtopic.php?f=3&t=2246