Nvidia released a new driver; version 295.33. Rumors are that this driver brings more stability. If you want to try this for yourself, you’ll need to install the X Updates repository. You can do this by using the following commands:
sudo add-apt-repository ppa:ubuntu-x-swat/x-updates
sudo apt-get update
sudo apt-get upgrade
Please let me know if this brings any value to XBMCbuntu!