They have put a limit on how often you can use any function that searches the database. The bulletin board software (UBB) uses a very brute force method to search posts and it can hog the CPU for up to a minute. That's why when you post a new item it will sometimes just wait and wait.. That's because it can't lock the tables to insert the item because a search is in progress.
It could be tuned to work better, but most sysadmins don't know how to do that.
