Some Forum menu page items and some sub-pages indicate new threads when they've all been read. I can't turn off a false New in 'Spin Me a Yarn', 'Feature Requests', and 'Resolved'. Sometimes it's my fault for using Back instead of clicking the forum name or Refresh, but these are especially stubborn.
On the other hand, some of the menu items, sorry, I can't tell you which right now, fail to show new or updated topics.
Since they balance out, I think this is a low priority fix, LOL. It may be my cookie settings, but then why does it work most of the time?
Links:
[1] http://crochetme.com/forum/header-error-log-page
[2] http://crochetme.com/forum/cosmetic-spacing