For myself, the forums (coming from Sins) have slowly become an absolute mess over time...no quote/reply/edit buttons are appearing, the layout of things (text, avatars) is really screwy and some pages (my replies) are completely unreadable...
I understand that it takes time and is a pain to support multiple (and new) browsers, but IE10 has been out since the end of October...
That's 4 months...
I find it rather concerning that a company who specializes in windows product doesn't have a website compatible with IE10...what bothers me more is that it was compatible, and now isn't after "updates"...