weird problem with ie10, forum index won't load, any help?

[whatsthegoodwor]

IE10 won't load the forum index although going directly to a subforum URL or thread URL works fine.

Any idea what the problem could be? Which template could cause this problem? I tried disabling all plugins and vbseo, no change. Other forums don't seem to report this problem either so it must be a mod I made.

Also, I reset forumhome template to default. No change.