Version:            (using KDE 4.4.2)
OS:                Linux
Installed from:    Ubuntu Packages

In "SystemSettings->Window manager" I checked the box that tells that a window should be closed when double clicking to upper-left menu icon. This behaviour should resemble one observed in other window managers (like CDE or MS Windows one).

But what I noticed is it required much more clicks than two for a window to be closed this way. I actually countered four clicks to close a window.

To reproduce the bug:

1. Open SystemSettings, go to window manager settings, there check the feature "close on double clicking upper left icon" to be active.
2. Apply the settings.
3. Choose any window on your desktop that you want to close.
4. Double click on upper left icon. You'll see that window menu will appear then will disappear. But the window won't close.
5. Do four clicks in rapid succession on the same button. On each of these clicks you'll see: the menu appear, then disappear, then nothing happened and then, on fourth click, the window will close.