I've seen that alot too, on Linux. Also I see an error for forgetting the - in front of options. It seems that earlier versions of Tk, let the programmer get away with some slop, like forgetting the - in front of options, or barewords. I switched to Tk804.026 and it has tightened up alot on the code, and was surprised to see alot of scripts which used to run error free, now demand more precision.