controller classes with underscores will no longer have multiple capital letters in them, ie, foo/bar_che will now map to foo.Bar_che instead of foo.Bar_Che. Controller prefix is now required, I wasn't going to do this, but we were always using it, and not having it is a security risk since you could in theory craft urls that would call the wrong module. This will make it a little harder to have plugins that have controllers, but since we don't have any of those right now anyway, I'll rethink about it when/if it becomes a problem