http://bugs.winehq.org/show_bug.cgi?id=15069
--- Comment #63 from Paul Romanyszyn pgr@arcelectronicsinc.com 2010-05-29 11:06:48 --- Testing with Delphi 3 IDE. Ubuntu 10.04 I found that under Gnome without compiz triggers the problem.
Gnome desktop effects set to off. Minimized MDI windows are not found by alt tab and can't be restored. Desktop effects set to minimum. All MDI windows show on alt-tab. Only the main window on the taskbar.
KDE Works if desktop effects are on or not.
Ubuntu 8.10 Gnome compiz not installed. MDI windows not found by alt-tab so no way to restore them.
Kpnl1.exe seems to work with desktop effect on in Gnome and in KDE any setting.