The kernel in precise-proposed fixes this for me.
$ cat /proc/version_signature Ubuntu 3.2.0-87.125-generic 3.2.69
$ df | head -3 Filesystem 1K-blocks Used Available Use% Mounted on /dev/vda1 7481832 5146416 1955360 73% / udev 371920 4 371916 1% /dev
The kernel in precise-proposed fixes this for me.
$ cat /proc/version_ signature 125-generic 3.2.69
Ubuntu 3.2.0-87.
$ df | head -3
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/vda1 7481832 5146416 1955360 73% /
udev 371920 4 371916 1% /dev