Comment 2 for bug 462040

I made some testing. Dialog-windows are disappearing with compiz enabled only. they get minimized and do not appear as a button or by pressing alt-tab. the only solution is to add the standard window-list-applet.

howto reproduce : open synaptic, and reload repositories or install something. while download or install process is active, change to another window or press the go-home applet. Go back to synaptic and dialog-window is hidden. If all repositories load, synaptic will come back, because the dialog-window will close automatically. but if for some reason a repository does not load or has no gpg-key, synaptic gets unusable because the corresponding window is hidden.

Hope that helps. Since i noticed this odd behavior with compiz or metacity compositing enabled, I'm not sure if this is the right place to announce this bug.