This is related to Bug #2422.

In regards to the refresh folder issue.



When marking folders as check for new mail, submitting... then leaving 
and coming back to the folder by going to the INBOX and then returning 
to folder view, the folders were no longer marked as 'check for new 
mail'.



For some reason, marking them immediately as check for new mail and 
then logging out and logging back in preserved the 'check for new mail'.

The refresh problem is unrelated to the #shared problem though, and 
I've been able to reproduce this too.

This *is* a duplicate of Bug 1550.  There is no patch in Bug 1550 that 
deals with this issue - the pach listed in 1550 dealt with a different 
problem that has already been fixed.

The Folder Navigator (folders.php) appears to have a problem showing 
courier-imap's #shared folders and seems to have other issues with 
preference subscribe value of 0.  ***



When dealing with a locked subscribe preference value of 0 .. things 
seem inconsistant but easily fixable for that particular situation but 
probably have side effects for users who configure horde with a 
subscribe preference value of 1.



By default, with the preference subscribed having a value of 0 and 
locked the #shared folder does not show up in the folder tree view and 
a folder nav refresh button results in an empty inbox.



after changing in imp/lib/Session.php

274             /* Initialize the 'showunsub' value. */

275             $_SESSION['imp']['showunsub'] = false;

to true... the refresh problem was resolved. So somewhere the 
preference of locking 'subscribe' to 0 isn't being completely respected?



* When dealing with #shared folders the Folder Navigator view seems to 
be highly inconsistant.



There seems to be a problem showing courier-imap's #shared folders.   
By default they just don't show up in the tree view even though 
'#shared." is specified in the server hierarchies field (if it does 
show up [sometimes on folder nav refresh] then it shows up with no 
shared dirs underneath it). ***



The patch here: http://bugs.horde.org/ticket/?id=1550 does not solve 
the problem. When I use the preference subscribed with a value of 0 
the #shared directory shows up fine with its subdirs but the INDEX 
directory does not show up at all. When I use the preference 
subscribed with a value of 1 results are spurratic and don't appear to 
be consistant with folders marked as being subscribed when clicking 
refresh and when toggling show/hide unsubscribed in the interface.



***side note: the open folder select box in the upper right works 
perfectly in all situations (unmodified and modified). It seems that 
since the open folder select box relies on an entirely seperate object 
for imap directory traversal through flist_IMP() that I can only 
assume that the Folder Nav problem lies somewhere between folders.php 
: imp's Tree.php : or horde IMAP Tree.php
$servers['domain.com'] = array(

     'name' => 'domain.com',

     'server' => 'localhost',

     'hordeauth' => false,

     'protocol' => 'imap/notls',

     'port' => 143,

     'folders' => '',

     'namespace' => '',

     'maildomain' => 'domain.com',

     'smtphost' => 'domain.com',

     'smtpport' => 25,

     'realm' => '',

     'preferred' => '',

     'dotfiles' => false,

     'hierarchies' => array( '#shared.' ) );