As an aside, we're aware that this forum software is less than ideal. Hawk has a lot of experience in managing communities, so we did do research when evaluating available software before we launched this community, and vBulletin was the pick of a bad bunch.
That said, some of the bugs that are beyond our control (like the occasional time-out, which I get sometimes) and weird page rendering issues where the comment box doesn't appear (but does when you reload the page) are unacceptable long-term, and we don't have a high level of confidence that the vBulletin can be relied upon to fix these issues in future releases.
For that reason, we will, at some point, be switching forum software. It's a while off, and we'll give you plenty of warning. But whatever small issues we encounter during the migration will hopefully be offset by the benefits of having a more reliable, more customisable forum that is better integrated with the rest of uxmastery.com. The plan is for that to happen before the end of the year.
In the mean time, we appreciate your patience!