I use ubuntu 12.04, x86_64, kernel 3.2.0-35-generic. I use KDE desktop. However, under KDE the GTK programs have black background in some areas. e.g. How to solve the problem?
Looks like you're using
evince (consider using the native applications for KDE,
okular respectively), which are both GTK 3.
I had this similar problem and was solved by setting GTK themes in KDE: install the
kde-config-gtk package and set the GTK theme (e.g. the Oxygen theme - I don't have an Ubuntu here to check the package name, I think it's