Due to changes introduced in IP.Board 2.3.0, the forum database needs to be rebuilt. The process is somewhat resource intensive and may slow the forum down. Since there are more than 115 000 posts to rebuild this might take some time, but things should return to normal in a few hours.
The forum has been upgraded from IP.Board 2.2.2 to version 2.3.1. Changes are limited to bug fixes and performance enhancements (not steroids, though ), and apart from marginally faster load times you shouldn't be able to tell the difference. If anything seems out of place, please let me know.