Mogweh
I'm running Ubuntu 11.10 64 bit (unity [gnome/GTK3])
With ours theres a permissions gotcha, check permissions on psclient and pslaunch and the .bin of both of thoes, make sure there set to execute.
I'm also running the proprietary ati FGLRX drivers.
Mint 11 runs LXDE window manager not Gnome/gtk3 yet and aren't slated till mint 12. It looks like if its not the permission thing, then its an LXDE thing.
I hope it helps.