[Dovecot] ESORT broken in Dovecot 1.2

Looks like ESORT is broken (just compiled 1.2 from hg 10 minutes ago).
Here is the command I'm using and the corresponding error message:

C: 5 UID SORT RETURN (ALL COUNT) (ARRIVAL) US-ASCII UNSEEN S: 5 BAD Error in IMAP command UID: Invalid sort argument.

The corresponding UID SORT command (without the RETURN syntax) works fine:

5 UID SORT (ARRIVAL) US-ASCII UNSEEN

• SORT 5 OK Sort completed (0.000 secs).

michael