Comment 2 for bug 154032

It happens with both metacity and Compiz (so yes, even without visual effects). I'm using Gutsy final but I suspect this is not a new issue.

In order to reproduce this you have to make sure that the window you open is a new window that has never been minimized before (since I'm not quite sure at what state does the window register whether it was minimized or maximized from the top or bottom of the screen).

I only use 1 GNOME Panel and added the "Window List" applet manually.