Folder name problem

[Peter Blajev]

We are using IMP-3.0 with Horde-2.0 to access our
IMAP mail servers. Recently we've discovered a problem
with folders that have "+" in their names. For
example "one + two" or "one+two".

When you go into this folder IMP doesn't show any messages.
When you exit from this folder and go into some other folder
IMP gives the error on the top of the page:

Warning: SELECT failed: Can't open mailbox one two: no such mailbox (errflg=2) in Unknown on line 0
HTTP/1.1 200 OK Date: Thu, 21 Mar 2002 23:19:00 GMT Server: Apache/1.3.23 (Unix) PHP/4.1.1 mod_ssl/2.8.6 OpenSSL/0.9.6a X-Powered-By: PHP/4.1.1
Expires: Thu, 19 Nov 1981 08:52:00
GMT Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0 Pragma: no-cache ETag: "689edc0233e3163dad67b8de510070ef"
Content-Length: 43494 Keep-Alive:
timeout=15, max=99 Connection: Keep-Alive Content-Type: text/html 


Is there any way to configure IMP to handle folder names with
some special characters like: "+". There is no problem with 
folders "one - two" or "one & two". Looks like "+" is treated
on some other way.

Thank you
Peter