[X2Go-User] Unity, Alt+Tab and Alt+`

Hello, list!

I use x2go client 4.0.1.1 (Qt 4.8.6) and x2go server 4.0.1.19 with unity (ubuntu 12.04) on my server machine and twm on client one. Alt+Tab works perfectly except that it shows all windows icons but not one icon of each type. Alt+ (switching between windows of the same kind) allows only switching to next or previous sibling, switching to any another using e.g. Alt+++ simply closes the switching dialog. Is this a bug, and is there a way to fix it by some kind of workaround?

Regards, Alexey Bashtanov