Hi Dave -

Yes, it was indeed a hidden file that I failed to find the first time
around (that should teach me for rushing through things).

I deleted the file, restarted excel and it still didn't work! I've
tried re-positioning the toolbox via the immediate window in the
following way (adapted from someone's query about an MS Access toolbox
problem):

application.vbe.commandbars("toolbox").left = 100
application.vbe.commandbars("toolbox").top = 100


that doesn't work either... I'll try to reboot and see what happens.

Thanks for the help!