Yes - I too have noticed this same problem. Same build. Actually, I have been having this problem since first upgrading to 9.x. For laptops, I know this problem is associated with docking and undocking. If I restart my laptop in the dock, then pl/sql works fine. However, if there is an undock opertation, the pl sql toolbars flash anytime a new window is opened and will progressivly deteriate until it is unusable. Seems to be related to the fact that the network switch from wired to wireless. Restarting PL/SQL does not fix the problem. Only rebooting laptop while docked fixes it. Or rebooting laptop undocked and not switching to a wired connection will fix it.