BTW, I guess https://help.ubuntu.com/community/DebuggingUSBStorage won't do much good here, so please ignore this for now. The kernel log should be most interesting for now.
-- Spontaneous unmounting of USB key https://launchpad.net/bugs/89572 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs