It happened to us. Missing tooltips on NoteFrog! Actually, tooltips were missing on all “programs” but present on “Browsers”, (yes, Browsers are programs too, but I’m making that exclusion for sake of identity).
So I began closing programs. No effect. Closed Firefox. No effect. Closed an instance of ie containing 6 tabs. Tootips returned for all programs, not just NoteFrog. I still had a tabbed instance of ie open. Re-opened the just closed instance of ie, containing the same tabs just closed. Still have tooltips on all programs.
This may take some research.
Update: Fixed for Version 2