I'm using Xubuntu 12.04 and installed RabbitVCS v0.15.0.5 for Thunar from the PPA. Unfortunately, there are no svn status emblems on my folders in Thunar. I already tried to update the icon cache as explained here.
Did the emblems ever work in Thunar? I'm not really sure, because usually RabbitVCS is used together with Nautilus.