usb writeback, with share mounted, hoses Puppy

[John Doe]

I wouldn't really call this a "bug" (rather a behaviour), but this seemed like the best group.

If you shutdown with a share mounted that is much larger (say 60gigs) than your usb stick (1gig), puppy dies while trying to write back to the pup100 file and your pup100 file is hosed.