I've been using "RENAME user.name user.name newpartition" to move a bunch of users to a different partition. I am using 2.1.9 under Linux 2.4.18.
After the RENAME completes, the user's quota file shows them using twice the quota that they are actually using. Running the 'quota' command fixes the problem. Looks like there might be a bug in the quota tracking in RENAME?...