Width Problems in IE

WordPress 2.8 (latest updates)
Mandigo 1.40.1
Nextgen gallery (last updates)

In Internet explorer i noticed a bug. I have no idea where to look for the solution. I have searched the forum, but nothing seemd simular.

Somehow my site looks to be wider in IE compared to FF where all works like a charm. It is also not always that i have this problem. I think it has to do with the larger images i post in some post, while most time i post complete galleries, thumbnails.

the site is http://www.spookeend.nl

I know it is a bit heavy on the loading time.