Description of problem:
When clicking the "X" in the upper right hand corner of the screen on a stack of
maximized windows, windows further down the stack will be closed if I click to
close to the absolute upper-right hand corner of the screen.

Version-Release number of selected component (if applicable):
FC5 + all errata as of 03/25/2006

How reproducible:
Always

Steps to Reproduce:
1. Open Firefox
2. Open Thunderbird
3. Maximize both
4. Bring Firefox into the foreground.
5. Click the left mouse button in the very top and right hand side of the screen.
6. Watch as Thunderbird will close instead of Firefox.
  
Actual results:
Thunderbird closed instead of Firefox.

Expected results:
Top-most window in Z order should be closed.

Additional info:
System was recently updated to FC5 using 'yum upgrade' technique from FC4.