[Dovecot] Outlook2010 + dovecot-1.2.10 - UID FETCH 0 (xxx) Error

[Jin FengMing]

Hi all,  I'm not so sure it is about to dovecot, but any thoughts will 
be appreciated.
I have an email account configured as IMAP(dovecot-1.2.10) via outlook 
2010. If I'm creating a *new* mailbox folder, for example "ttt", and 
*copying* a mail into *that* mailbox folder,  then an error message 
window will be displayed.

The problem caused by
  C:UID FETCH 0 (UID FLAGS RFC822.SIZE BODY.PEEK[HEADER] INTERNALDATE)
  S:3mgc BAD Error in IMAP command UID FETCH: Invalid uidset

The dovecot's rawlog

20100101-060322-5491.in:
54nc IDLE
DONE
uh4m SELECT "INBOX.ttt"
37ax IDLE
DONE
5dtr FETCH 1 (UID)
3mgc UID FETCH 0 (UID FLAGS RFC822.SIZE BODY.PEEK[HEADER] INTERNALDATE)
28kc IDLE
DONE
msxw CLOSE
tuis IDLE
DONE
a6rl SELECT "INBOX.ttt"
59oj FETCH 1 (UID)
k26b UID FETCH 1 (UID FLAGS)
z8su IDLE
DONE

20100101-060322-5491.out:
* OK [RAWLOG TIMESTAMP] 2010-01-01 06:03:22
7u95 OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE 
SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS MULTIAPPEND UNSELECT 
IDLE CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE 
QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS] Logged in
+ idling
54nc OK Idle completed.
* FLAGS (\Answered \Flagged \Deleted \Seen \Draft)
* OK [PERMANENTFLAGS (\Answered \Flagged \Deleted \Seen \Draft \*)] 
Flags permitted.
* 0 EXISTS
* 0 RECENT
* OK [UIDVALIDITY 1262323866] UIDs valid
* OK [UIDNEXT 1] Predicted next UID
* OK [NOMODSEQ] No permanent modsequences
uh4m OK [READ-WRITE] Select completed.
+ idling
* 1 EXISTS
37ax OK Idle completed.
* 1 FETCH (UID 1)
5dtr OK Fetch completed.
3mgc BAD Error in IMAP command UID FETCH: Invalid uidset
+ idling
28kc OK Idle completed.
msxw OK Close completed.
+ idling
tuis OK Idle completed.
* FLAGS (\Answered \Flagged \Deleted \Seen \Draft)
* OK [PERMANENTFLAGS (\Answered \Flagged \Deleted \Seen \Draft \*)] 
Flags permitted.
* 1 EXISTS
* 0 RECENT
* OK [UIDVALIDITY 1262323866] UIDs valid
* OK [UIDNEXT 2] Predicted next UID
* OK [NOMODSEQ] No permanent modsequences
a6rl OK [READ-WRITE] Select completed.
* 1 FETCH (UID 1)
59oj OK Fetch completed.
* 1 FETCH (UID 1 FLAGS (\Seen))
k26b OK Fetch completed.
+ idling
z8su OK Idle completed.