Comment 38 for bug 147045

I'm having the same problem and removing the .gtkrc-2.0 fixed this issue. But running "gnome-appearance-properties" in terminal displays

sree@BlueGene:~$ gnome-appearance-properties
/home/sree/.themes/Mac4Lin_MacMenu_Graphite_v0.4/gtk-2.0/gtkrc:2219: Unable to find include file: "icons/iconrc"
/usr/share/themes/Clearlooks-gperfection2/gtk-2.0/gtkrc:52: Clearlooks configuration option "menuitemstyle" is not supported and will be ignored.
/usr/share/themes/Clearlooks-gperfection2/gtk-2.0/gtkrc:53: Clearlooks configuration option "listviewitemstyle" is not supported and will be ignored.
/usr/share/themes/Clearlooks-gperfection2/gtk-2.0/gtkrc:54: Clearlooks configuration option "progressbarstyle" is not supported and will be ignored.
sree@BlueGene:~$

But it works without any problem.