[imp] IMP folder settings don't "stick"

[Sun Advocate Webmaster]

I have the most recent stable versions of Horde & IMP as of this 
writing. For the most part, Horde is working great. I do have a concern, 
however.

In the horde configuration, you select which IMAP folders Horde uses for 
drafts, sent items, and so on. By default, it wants to create an 
INBOX.sent-items or INBOX.Trash and so on. I want it to match my Mozilla 
Thunderbird configuration, however. It uses "Sent" "Trash" and so on. I 
have set the proper configuration options on horde to use these new 
folders, but after so many login sessions, they revert back, and horde 
ends up creating a bunch of new folders (INBOX.sent-items), which is 
what I don't want.

I'm using MySQL as my preferences storage. The horde user has full 
control to the horde_prefs MySQL table, as well as every other table in 
the database.

Any ideas or suggestions? I want to make webmail available to users, but 
I'm concerned that they will be more than confused if things don't work 
out perfectly (they're not techno gurus).

Thanks!