For Arch, find what icon theme you are using and edit the line Inherits= to Inherits=gnome
example, I'm using oxygen:
Code:
nano /usr/share/icons/oxygen/index.theme
This allows clamtk to start from Applications, or from cli, e.g
Arch 4.3.0-1-ck (recent -Syu), it may work same or similar in Slackware?