I've rebuilt everything, search index, post history, forum stats, etc with no luck. Only disabling the accelerator seems to fix this and I'm at a loss. If the accelerator is enabled, it takes 2-6 hours for the error to pop up. Any ideas anyone? I don't even know how to start debuging this error.
ps- I think this is the wrong section for this post so feel free to move it to a more proper location.