[Dovecot] Problems with Outlook 2002 SP3 & Dovecot 0.99.13 Redux

[Md]

Hi,
   I posted this question a while back and didn't get much response.  Since then, I've done
a bit more experimenting and wonder if someone can help me move forward towards resolution.

The orignal question...
>    I'm running Dovecot0.99.13 on Fedora Core 3 and things work fine when using either
>    Thunderbird 1.0 or Outlook Express as IMAP clients.  Outlook (2002 SP3) on the other hand
>    runs incredibly slowly, or just outright hangs.

I've discovered that if I delete and recrete .../Maildir in the user account such that the directory
exists but is empty, then outlook seems to behave.  If on the other-hand, I try to create a folder, 
with outlook, outlook will hang and the folder won't be created.  If I create the folder with another
client and then go back to using outlook, outlook will hang.

I've taken some network traces and have annotated them here...

Starting with an empty "Maildir"
   Time        Source                Destination           Protocol Info
   8.515435    192.168.73.3          192.168.73.1          IMAP     Response: * OK dovecot ready.
   8.516056    192.168.73.1          192.168.73.3          IMAP     Request: 0000 CAPABILITY
   8.516539    192.168.73.3          192.168.73.1          IMAP     Response: * CAPABILITY IMAP4rev1 SORT THREAD=REFERENCES MULTIAPPEND UNSELECT IDLE CHILDREN LISTEXT LIST-SUBSCRIBED NAMESPACE STARTTLS AUTH=PLAIN
   8.516733    192.168.73.1          192.168.73.3          IMAP     Request: 0001 LOGIN "xxx" "xxx"
   8.594634    192.168.73.3          192.168.73.1          IMAP     Response: 0001 OK Logged in.
   8.640521    192.168.73.3          192.168.73.1          IMAP     Response: + idling
   8.640709    192.168.73.1          192.168.73.3          IMAP     Request: DONE
   8.640983    192.168.73.3          192.168.73.1          IMAP     Response: 0002 OK Idle completed.
   8.641165    192.168.73.1          192.168.73.3          IMAP     Request: 0003 LIST "" ""
   8.641315    192.168.73.3          192.168.73.1          IMAP     Response: * LIST (\Noselect) "." ""
   8.642387    192.168.73.1          192.168.73.3          IMAP     Request: 0004 LIST "" "INBOX"
   8.642956    192.168.73.3          192.168.73.1          IMAP     Response: * LIST (\HasNoChildren) "." INBOX
   8.657424    192.168.73.1          192.168.73.3          IMAP     Request: 0005 LSUB "" "*"
   8.657925    192.168.73.3          192.168.73.1          IMAP     Response: 0005 OK Lsub completed.
   8.660627    192.168.73.1          192.168.73.3          IMAP     Request: 0006 IDLE
   8.660973    192.168.73.3          192.168.73.1          IMAP     Response: + idling

Now try to create a sub-folder using outlook:
   0.000000    192.168.73.1          192.168.73.3          IMAP     Request: DONE
   0.000587    192.168.73.3          192.168.73.1          IMAP     Response: 0006 OK Idle completed.
   0.000910    192.168.73.1          192.168.73.3          IMAP     Request: 0008 IDLE
   0.001113    192.168.73.3          192.168.73.1          IMAP     Response: + idling

And there outlook just hangs. Killing outlook and starting it again gives this trace:
   5.110260    192.168.73.1          192.168.73.3          TCP      1953 > imap [SYN] Seq=0 Ack=0 Win=64240 Len=0 MSS=1460
   5.111826    192.168.73.3          192.168.73.1          IMAP     Response: * OK dovecot ready.
   5.112139    192.168.73.1          192.168.73.3          IMAP     Request: 0000 CAPABILITY
   5.112600    192.168.73.3          192.168.73.1          IMAP     Response: * CAPABILITY IMAP4rev1 SORT THREAD=REFERENCES MULTIAPPEND UNSELECT IDLE CHILDREN LISTEXT LIST-SUBSCRIBED NAMESPACE STARTTLS AUTH=PLAIN
   5.112798    192.168.73.1          192.168.73.3          IMAP     Request: 0001 LOGIN "xxx" "xxx"
   5.127237    192.168.73.3          192.168.73.1          IMAP     Response: 0001 OK Logged in.
   5.135355    192.168.73.1          192.168.73.3          IMAP     Request: 0002 IDLE
   5.137334    192.168.73.3          192.168.73.1          IMAP     Response: + idling
   5.138060    192.168.73.1          192.168.73.3          IMAP     Request: DONE
   5.138273    192.168.73.3          192.168.73.1          IMAP     Response: 0002 OK Idle completed.
   5.138505    192.168.73.1          192.168.73.3          IMAP     Request: 0004 IDLE
   5.138646    192.168.73.3          192.168.73.1          IMAP     Response: + idling

And there outlook just hangs again.

Any ideas or help would be greatly appreciated.
Thanks,

Md