This is only for Nero Recode (which is still beta)... Besides, if you choose to dump your temporary files into the root of your drive... you, the user, is asking for trouble... I am not sure if this would be Ahead's fault...
By default, it is set to dump the temporary files to your temp directory... So if the user changes that, it's their fault...
Just my 2 cents...
-SlickVic78