I really dislike IPB. I tried it several years ago on another forum site as a test for moving CZ over to it from vBulletin 3 (still the best version of vBulletin). The IPB software was very bloated and the front-end design was not optimized at all for speed. The worst part about IPB is that it relies heavily on caching .. and I mean caching everywhere and everything .. just to perform adequately under average traffic.
Oh yeah... and the caching often times could be a nightmare. Yet, you talk to them over there... they thought they made the holy grail with that caching they had. Had a couple different forums with a few thousand members. People drove me crazy after awhile... closed one, and sold one off lol...
You have my respect for dealing with it.
One was a online marketing forum... I would get messages from adults all the time crying because someone picked on them. Bashing members was one thing... but the things they would cry about drove me nuts. People would state something, and someone would tell them they were wrong... and all of a sudden they were being bullied lol.
Running a forum, taught me exactly why much of the world is the way it is today.