[imp] Can't create subfolders with UW-IMAP

[Andreas Vögele]

I can't create subfolders with UW-IMAP when using IMP 4.1 or IMP 
4.1.1-cvs.  For example, if a user tries to create a subfolder B in 
folder A he gets the following error message:

The folder "A/B" was not created. This is what the server said: CREATE 
failed: Can't create mailbox node /home/peter/mail/A/: File exists

We have always used "set mail-subdirectory mail" in /etc/c-client.cf, so 
we didn't get the problems that others had with UW-IMAP when they 
switched to IMP 4.1.  I've just recompiled UW-IMAP with the patch from 
the Horde wiki and removed the mail-subdirectory setting from 
/etc/c-client.cf. But I still can't create subfolders.

Has anyone else encountered this problem?

This is our server configuration:

$servers['imap'] = array(
     'name' => 'IMAP Server',
     'server' => 'localhost',
     'hordeauth' => true,
     'protocol' => 'imap/notls',
     'port' => 143,
     'maildomain' => 'icido',
     'smtphost' => 'localhost',
     'smtpport' => 25,
     'realm' => '',
     'preferred' => '',
);