Recently I have begun the migration to the latest version of vBulletin. During this process I have also upgraded some of the server software.
The chat software was changed from FlashChat to Addon chat, FlashChat's developer had dropped the ball and the software was lagging behind others. Hopefully in due time I will be able to get a mobile version of the chat running.
The old Knowledge base had some issues with the server up grade, those have been fixed. Over time