GUI - Minimize, maximize, close and resize of windows sometimes impossible

Minimize, maximize, close and resize no longer work in several apps after using Ubuntu for about 1 to 3 hours.

For example: Before opening several torrents with transmission the windows could still be resized, closed, etc. After opening several torrents with Transmission the window of transmission and al other application windows as wel where fixed (windows buttons disapeared and resizing was no longer possible). Basically al windows changed to a modal window.

This problem is reproducable after restarting the system. The best way for me to reproduce is by opening several torrent with transmission, but it seems to occur with other applications as well.

p.s.

I also noticed that the only application not having this problem is google Chrome. The reason for this probably is that Google chrome behaves different from other windows because it does not use ubuntu windows buttons but keeps using the old style buttons on the right side of the window.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: transmission-gtk 2.61-0ubuntu2
ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
Uname: Linux 3.5.0-17-generic x86_64
ApportVersion: 2.6.1-0ubuntu6
Architecture: amd64
Date: Sun Oct 28 22:44:24 2012
ExecutablePath: /usr/bin/transmission-gtk
InstallationDate: Installed on 2012-10-01 (27 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Beta amd64 (20120926)
MarkForUpload: True
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: transmission
UpgradeStatus: No upgrade log present (probably fresh install)