Bug#389881: RC-ness of this bug

[peter green]

> I don't know how invasive those changes might be. AFAIK Ubuntu already
> does it (Colin?) and wouldn't be too hard to pick the changes from
> them but we would also need RM and Frans approval :(
ubuntu already does what? there are four possible soloutions proposed aren't 
there (labels in fstab and the 3 different /dev/by-* trees)