Package: kwin
Version: KDE 2.1.1 
Severity: normal
Installed from:    Debian Packages
Compiler:          Not Specified
OS:                Linux
OS/Compiler notes: Installed from deb packages in sid.  Running sid.

Before maximizing any window to test the bug, make sure that you uncheck 'Allow moving and resizing of maximized windows' in the Look & Feel/Window Behavior/Advanced tab.  Otherwise, maximizing a window does change the size of the window but really just leaves it as an unmaximized window.

Maximize a window (the control center window will probably be convenient).

Type the 'Window Operations Menu' key (Default is Alt-F3).

The menu should not work.

(Submitted via bugs.kde.org)