wrt the PerformanceFu problem, it seems like Fubar2Broker calls for a text update before the addons OnEnable has fired. So it'd say it's a bug with Fubar2Broker although it can be worked around by eg initialising some stuff OnInitialize in PerformanceFu.
BTW: The right-click menu is broken, too, when using it via LDB.
It also appears that this error can also occur with just FuBar and PerformanceFu installed and nothing else. The solution is just to initialize that nil value to 0 at the top of the file.