[Dovecot] Horde/IMP setup

[Eric]

does anyone else use Horde/IMP that can share their servers.php setup? I
am getting weird behavior with IMP not showing my INBOX and sub folders,
etc. and i am not sure if its an IMP issue or Dovecot.  It was giving me
problems yesterday, then it cleared up, but now its acting up again.
mail clients like Thunderbird work fine tho. I am seeing this in the
logs a lot:

[Tue May 16 08:08:21 2006] [error] [client 67.133.211.52] PHP Warning:
Invalid argument supplied for foreach() in
/usr/local/www/horde/imp/lib/IMP.php on line 1197, referer:
https://mikestammer.com/horde/services/portal/sidebar.php

Line 1197 looks like this:

   foreach ($_SESSION['imp']['namespace'] as $key => $val) {
            if (!empty($key) && (strpos($mailbox, $key) === 0)) {
                $cache[$key][$mailbox] = $val;
                return $val;
            }
        }

Anyone have any tips or ideas?