Comment 37 for bug 299330

Hi, to confirm, I'm still having the issue since a year ago, even on the latest ubuntu.
I observe 3 or 4 seconds (more with more open windows) before the alt-tab window appears. During this time, the system is not responsive, and thus I lost the habit of using alt-tab, using the mouse to switch app focus....
This only happens when using compositing with metacity.
While we could expect that compositing should not be used with metacity (software rendering), compiz has issues with multi-monitors, and compositing is necessary for several media applications.
As stated in the previous message, changing the order of the alt-tab treatment would be best. A simpler fix would be to be able to modify thumbnails options, such as turning it off.