I don't like clicking the header and having it lead to the homepage. I have been using it to refresh or redirect me to the forums' top page. Now I keep forgetting that it leads to my homepage and that I have to click the link for "forums" after the fact.
Also, in the homepage, while I like the recent threads I've participated in, I don't like that it takes you to the first page of said thread after clicking it. Should take you to the last page of the threads.