i think this is just a minor bug, when you give a button a label like [a] you can no longer get its properties via right-click.
#X obj 9 5 bng 35 250 50 0 sd empty [/] 4 17 129 20 -260818 -241291
renaming the offending []s to something else with a text editor fixes the issue. i've had tcl get confused with []-containing variables before, due to the way it uses them like ` backticks to embed other functions. maybe changing [ to [ in the proper place in the code would fix it...
i like tk based gui, the free floating windows are much nicer than the way everything in pc-max seems to be stuck inside a big grey parent window which takes over your screen if you want it big enough to not require scrollbars, but it seems to use about 10% of a 1.4g AMD or 100% of a pentium150 unless -nogui is flagged. is there perhaps a newer version of the wish-gui stuff that doesnt use so much cpu on nt? or is it universally hoggy on other platforms...