UI Designer mentioned that he has moved his taskbar to the top of his desktop rather than leave it in the default position at the bottom of the screen.
I tried this out myself a few years ago and have stuck with it ever since - less mousework to do since all the other apps I use have their menus also positioned at the top (I was a mac user during 80's and early 90's, so was used to this already).
He (does have a name but I can't find it) makes a good point that UI designers need to consider all the possible permutations of an interface if you allows users to personalise (prompted by a balloon message gripe he describes but isn't quite clear to me). I don't seem to have any usability issues with the config he describes.
I disagree with his view that Microsoft shouldn't have allowed the user to move the Taskbar (hey UI...you like it right?).