[imp] Quota display problems

[Luis Hernán Otegui]

Hi everybody, I have a really disturbing problem. I'm running Horde
Webmail Edition 1.0.3 over Debian Sarge, with courier-imap
3.0.8-4sarge5, maildrop  2.0.2-11~bpo.1, Postfix and PostfixAdmin.

I've implemented virtual quota support in Postfix, and here's the
pertinent section of the /horde/imp/config/servers.php file:

$servers['imap'] = array(
    'name' => 'IMAP Server',
    'server' => 'localhost',
    'hordeauth' => false,
    'protocol' => 'imap/notls',
    'port' => 143,
    'maildomain' => '',
    'realm' => '',
    'preferred' => '',
    'quota' => array(
       'driver' => 'courier',
       'params' => array(),
     ),
);

The issue resumes to this: some users (not all of them) are
complaining that their quota display in IMP is unreliable. Some times
they delete a (small) message, having over 80% of their capacity full,
and the quota display bar falls down to 22% or so (cyphers are
irrelevant here, I'm just trying to throw an example out). So they
feel safe, thinking they have that 22% of space occupied. But when a
new mail arrives, their quota jumps back to 80-something percent (or
more).
I've thought it was a permission issue, and checked back and forth the
files in those people's maildirs. But could find nothing.

Has anyone been through this before? could you throw me a hint?

Thanks in advance,

Luis
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When I grow up, I wanna be like Theo...
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