Following upgrade to 12.10, my usb drives - both pen drives and a usb hard drive - fail to mount with the error message:
Unable to mount *name of drive* volume
Adding read ACL for uid 1000 to '/media/*my home file name*' failed: Operation not supported
This is on a desktop Dell Inspiron 530.
I also have a Dell Inspiron Mini 10 netbook which I also upgraded to 12.10 (slightly smaller installation on a flash hard drive). all devices mount automatically without problems on this computer.