I don't have any minipanel appearing when I hit the W key. Earlier it used to be Full Panel ---> W ---> Minipanel ---> W ---> No panel, but now it just, um, skips the minipanel stage...
I looked at the panel.cfg in the FS2002 > AIRCRAFT > DEFAULT > PANEL folder, and everything looks fine, to my untrained eyes. :-)
This, incidentally, happens in all aircraft, default or otherwise.