[Dovecot] public or shared folders

Hello

I would like to setup a public namespace with folders under it that are accessiable by certain users. Something like this:

Projects---- | |-----03060 | |-----04579

Users should be able to move emails from their inbox to the shared folders, and all user can see the moved email.

Here is what I have done so far:

1. I installed dovecot-1.0-0 4 stable20050221.rhf3.at.i386.rpm to a Fedora core 3 machine with Postfix and procmail.
2. Tested mail server - both pop and imap work.
3. Modified dovecot conf. file with the following entry:

namespace private { separator = / prefix = inbox = yes hidden = no }

namespace public { separator = . prefix = Projects. location = maildir:/var/mail/Projects inbox = no hidden = no }

4. Restart dovecot. Test - imap and pop work.
5. Create group imapu. Add email users to group imapu
6. Create (as root) /var/mail/Projects. Change group to imapu. Change mode 770
7. Touch file dovecot-shared to /var/mail/Projects. Change group to imapu. Change mode 770
8. Make directory /var/mail/Projects/.03060. Change group to imapu. Change mode 770
9. Touch file dovecot-shared to /var/mail/Projects/.03060. Change group to imapu. Change mode to 770
10. Restart dovecot.

I start up thunderbird and the Project namespace shows up. I then subscribe to 03060 and get this error: The current command did not succeed. The mail server responded: Error in IMAP command UID: Invalid BODY[..] parameter: Missing '>' <10240.-1357>'.

I click ok and I can move email from the inbox to 03060. The mail shows up in 03060. No other user can then subscribe to 03060.

What am I doing wrong?

Thanks Rick