I'm having some problems with the new tag cloud widget which I didn't have with the category widget. For some reason I get the Not Found-page when I click a tag.
At first I thought is only happened when I was clicking a two worded tag (like http://altanen.wordpress.com/category/copenhagen-institute/) but now it seems it applies to all tags, regardless of the number of words.
For some reason though, some of the tag-links actually produces a list of posts with the corresponding tag (ex: http://altanen.wordpress.com/category/liberalisme/).
It's all kinda weird but I'm betting this has something to do with a sort of conflict between categories and tags. It seems when I have both a category and a tag with the same name I get the list of post; when I only have a tag I get the Not Found-page.