[Revan]

Your code lacks a check to see if the cache system functions properly.
Im getting foreach errors after something happened that I think broke the cache system (I dont have access to the table atm so I can't verify this), but you should code in a check to see if unserialize either fails or returns not an array, and also a rebuild function available in the main vbugs.php that will update the cache properly.
And yes, I did try saving all Statuses/etc.

PS: You should make an ACP option for the filename of the bugtracker, currently I have to rename it manually.