I'm using GUIMiner on the beta of Ubuntu 11.10 x64.   It appears to be working correctly (I get similar hash rate to under windows, I've been receiving coins, etc.) but I get a warning on load.   "(python:27807): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap","     The number changes each time.   Any ideas why this is or what I need to do to fix it?