Example my site runs it
http://www.projectoblivion.com/forums/
You will not find those bugs I mentioned on my site as they do no suffer from it. The sitemap bug bothers me and I have been attempting to fix it however my lack of php knowledge has not helped.
None of the bugs are show stoppers but in a particular situation when a person has a number in their name instead of viewing their profile it gets redirected to a post.
At this point I would recomend VBSeo, but as stated many a many a time. You do NOT need SEO urls etc... It does some basic things for you that can help but alot of it is available free here.
VBulletin.com gets extremly well indexed and so does .org without any SEO done at all.
Google for example has a seperate script that parses forums.