Just noticed this: probably a small thing. the Forum display page for each forum has a column stating for each thread when its most recent post was made, and who made it.
Thing is, however it gets the poster's name, the link is a search query (the member who made the last post in the given thread).
Usually this is fine; but if someone posts in a thread after that page is displayed (and until it's refreshed, of course), the profile being linked to by that URL will no longer be the profile of the user named in the text of the link.
While the forum display page can't be expected to be aware of changes made after it has been generated, it means that sometimes the link doesn't actually go where it claims to.
Since generating that link involves querying the user table (in order to get the username), perhaps the content of the URL could be determined from the user as well, rather than the thread. (Just as an aside, this would result in the thread table(s) being left out of consideration when handling the request.)