Description of Problem: If you change your
resolution using xrandr or the new display
capplet, maximised windows will maximise
"underneath" a panel.


Steps to reproduce the problem:
1. Maximise a window.
2. Change your resolution (best to change to a
smaller resolution) using xrandr (either with the
command-line util or with the capplet).
3. Your maximised window will now extend beyond
any non-autohide panels. (In particular, if you do
this with a default GNOME desktop, the window will
extend beyond the panel at the bottom of the screen.)

Actual Results:
Your maximised window will now extend beyond any
non-autohide panels. (In particular, if you do
this with a default GNOME desktop, the window will
extend beyond the panel at the bottom of the screen.)

Expected Results:
The window should be maximised as it was before
changing resolution; i.e. the bottom portion of it
should not be covered by the panel.

How often does this happen? 
Every time.

Additional Information:
Not 100% sure if this is a panel bug or a metacity
bug, but it would seem that metacity is doing its
job (it seems to maximise to mostly the correct
the size, except for the panel). Also, if you
resize the panel in question using its properties
dialog, the problem is fixed instantly. So,
something that the panel does when it gets resized
fixes the problem.