When editing your profile in the UCP on the forum, there is a field:
Forum Collapse Data:
Comma-delimited list of categories to collapse
This field registers whether forum is collapsed or not, but the field area in IE7 is expanding to far, just check it on your own profile:)
*Karma comes in many forms, my personal favourite is the random saucepan from the sky* J.Spencer 17-02-2009