ManualG stated in the nVidia forums that they were aware of issues with the r325 branch and 4xx , 5xx video cards and stability issues. He also stated that the next driver branch after the r325 would have a fix. This driver is just as stable as the last beta for me. For those that are having issues with Firefox, try Chrome instead, I personally have had issues with Firefox. Uninstalled it and went to Chrome and all the weird freezes are gone.