Well, it is safe to say this is not a bug but I am guessing you all suspected that from the start. I have transfered my forums to my new server and the Who's On Line disappearing on the main forum list page problem is not happening.
This is not a fresh install by the way, I zipped up my current live forums directory and unzipped it to my new server, set the file permissions, imported my database and ran the install script.
All seems well. This doesn't explain what the heck is happening on the live server at the moment but I am glad it is corrected. Thank you to all who offered help!
