Description of problem:
The window manager doesn't forwards any 'ButtonRelease' event to app, if 
'ButtonPressMask' is not passed in 'XSelectInput()' Xlib routine.

Version-Release number of selected component (if applicable):
metacity-2.14.3-1.fc5.1

How reproducible:
Just compile and run the app in the following comp.window.x thread:
http://groups.google.com/group/comp.windows.x/browse_frm/thread/bfe8d4e856d6a592/a9072bf02a35955f#a9072bf02a35955f

Steps to Reproduce:
1. Try releasing mouse button on the app's window
2. If window gets destroyed, this means WM is fine
3. If window doesn't destroys, it means WM is not forwarding
  
Actual results:
'ButtonRelease' event is not forward to the app by WM, and hence unable to 
catch any 'ButtonRelease' events. If 'ButtonPressMask' is also passed in the 
'XSelectInput()' routine, then only 'ButtonRelease' event fires.

Expected results:
'ButtonRelease' event should be forwarded to the app, if 'ButtonReleaseMask' 
is passed in 'XSelectInput()' Xlib routine.

Additional info:
I've also posted in GNOME Bugzilla, but as a comment to existing similar 
looking Bugreport. Attached is the source code of the app I'm trying to 
execute.