I have experienced this error a number of times now, but its very random. so far only happened while i spec, but then lately i've been specing more than playing so hard to say if that's the only time it will happen.
The errors can take the form of:
LuaUI: error = 2, IsAbove, [string "LuaUI/widgets.lua"]:714:attempt to call global '' (a nil value)
LuaUI: error = 2, IsAbove, [string "LuaUI/widgets.lua"]:1343: attempt to call method ' | |' (a nil value)
I've noticed that the status info down the bottom is gone, no Lua stuff works and if i select something then the panel is missing a whole heap of gfx. also it seems to fire whenever i mouse over something on the map. I presume it's occurring when its trying to show the status.
Attached is a file showing the problem:
Well a screen shot of the problem would be attached but i can't upload files right now
