2.5.3: Inconsistency in subscription list separator?

[Patrick Goetz]

I posted a question about this to the info list, but think it might be 
more of a devel issue.

I recently upgraded from 2.4.17 to 2.5.3.  This went more of less 
smoothly; however, one user appears to have lost access to some of his 
mail sub-folders.  They're grayed out in Thunderbird and don't even show 
up when using Roundcube.

Someone on the info list suggested that I check the user's subscription 
list, where I noticed this:

   user.djones.Archives Staff
   user.djones.Archives Staff.1Amy Smith
   user.djones.Archives Staff.David Jones
   user.djones.Archives Staff.Delia Burton
   user.djones.Archives Staff.Drew Patterson
   user.djones.Archives Staff.Eleanor Smythe
   user.djones.Archives Staff.Former Staff
   user.djones.Archives Staff.Julia Moscovy
   user.djones.Archives Staff.Kate Ooldfield
   user.djones.Archives Staff.Amy Smith

This, by the way, is one of the sub-folders no longer accessible to the 
user.

I've been using

     unixhierarchysep: yes

since version 2.4.17, yet the subscription list is still formatted using 
a "." as a separator?  What happens if there is a "." in the mailbox 
folder name?

Second, this would appear to be a permissions problem, but the 
permissions on that mailbox look absolutely normal. Maybe I just need to 
run cyrreconstruct to rebuild the indexes for the affected mailbox 
folders?  I've never seen this problem before and am clueless as to how 
to address it.

   localhost> lam user/djones
   djones lrswipkxtecd
   localhost> lam user/djones/Archives\ Staff
   djones lrswipkxtecd
   localhost> lam user/djones/Archives\ Staff/1Amy\ Smith
   djones lrswipkxtecd