Hmmm...so the lightbulbs only work if the user never logs out.

Some of our UBBs are used commercially, and we currently encourage our users to log out each time to prevent unauthorised access to their accounts.

To continue this practice, is there an official method of allowing the users to log out and still have use of the lightbulbs to indicate new posts since they last logged in, or should I start looking/creating a hack?