Comment 4 for bug 464883

It turns out that my system frezzes if I start another application (e.g. firefox).
And here is what I got from the shell:

jugend@praisemachine:~$ compiz
Checking for Xgl: not present.
xset q doesn't reveal the location of the log file. Using fallback /var/log/Xorg.0.log
Detected PCI ID for VGA:
Checking for texture_from_pixmap: not present.
Trying again with indirect rendering:
Checking for texture_from_pixmap: present.
Checking for non power of two support: present.
Checking for Composite extension: present.
Checking screen 1Comparing resolution (1400x1050) to maximum 3D texture size (2048): Passed.
Checking for Software Rasterizer: Not present.
Checking for nVidia: not present.
Checking for FBConfig: present.
Checking for Xgl: not present.
Couldn't find a perfect decorator match; trying all decorators
Starting gtk-window-decorator
WARNING: Application calling GLX 1.3 function "glXCreatePixmap" when GLX 1.3 is not supported! This is an application bug!
Warnung der Fensterverwaltung: Thema »Clearlooks« konnte nicht geladen werden: Es konnte keine gültige Datei für das Thema »Clearlooks« gefunden werden.

The last sentence is a Warning from the window manager and says that the theme "Clearlooks" couldn't be loaded. It couldn't find a valid file for the clearlooks theme.