Comment 8 for bug 36213

This change may help:

partman-auto (41ubuntu3) breezy; urgency=low

  * Don't attempt to automatically resize fat16 partitions, since they
    appear to cause errors when finding the resize range and probably aren't
    big enough to worry about anyway; should work around Ubuntu #13250.

 -- Colin Watson <email address hidden> Wed, 7 Sep 2005 15:00:22 +0100

I'm not convinced this addresses the real problem (something seems to be wrong
with exception handling in partman), but it should at least be a workaround.
When the Breezy preview is released, please test with that to see if the
partitioner now works.