You can try this not sure if it will work. Seems like the problem is with the gtk themes.This is how we do it with fluxbox or openbox. Create the file .gtkrc-2.0 in your home directory;
Code:
gtk-icon-theme-name = "Crux"
gtk-theme-name = "Traditional"
Just put whatever icon theme and theme you have on your system, most times in /usr/share/themes and /usr/share/icons If it doesn't work just remove it.