My HUD crashed (8-tabling PokerStars). Previous to the crash and post-crash, the popups would stick on the screen even after I had stopped hovering over the box... everything was very laggy, and this is usually not the case for my system.
Finally, I just got an error "Insufficient memory to create the bitmap. Close one or more applications to increase available" - The message is truncated at that point.
Table Manager 1.6.4t
Everything runs smoothly when the HUD is off.