[horde] Errors being received - Explanation please

[Steve Campbell]

I've got the recent Webmail installed and am seeing warnings/errors in 
my messages file in the following form:

HORDE: [imp] PHP ERROR: strpos(): Empty delimiter [pid 7332 on line 1404 
of "/var/www/html/horde/imp/lib/Mailbox.php"]

Researching this, I see where this existed back a few years ago, and 
usually happened when "special" mailboxes were empty.

Can someone explain how this can be resolved, please? I've yet to find 
how it was resolved.

Thanks,

steve campbell