Comment 117 for bug 1073433

ABSOLUTELY!

64-bit Desktop 3.8.0-19-generic #29-Ubuntu SMP Wed Apr 17 18:16:28 UTC 2013

IF
Internet connection to the modem exists and
Ethernet connection from my desktop to the modem and
Enable Networking checked and
Shutdown or Restart or Reboot
THEN
Bad shutdown
fsck from another copy of Ubuntu will indicate problems, see attachment
END

Dropping the Ethernet connection by unplugging the Ethernet cable or unchecking Enable Networking before a shutdown or reboot will ALWAYS keep the problem from occurring. This problem has existed since 12.10 and has been discussed but not fixed.

If it is helpful to know, while the Ethernet connection is up small keepalive packets seem to be sent and received from time to time.