Comment 60 for bug 482419

Above patch has now been uploaded to lucid-proposed waiting for a SRU team member to review and let it through.
Once it's through, I'd recommend anyone with a similar setup to run the test.

The above /etc/network/interfaces and switch configuration should consistently reproduce the issue with current lucid's ifenslave.
So far (5 reboots), the proposed fix also seems to work fine.