[imp] IMP Warning messages - not in FAQ

[FZS]

Hi all,

When I log out of IMP (which is working fine
otherwise) I get the following messages on my
logout screen :

Warning: Constant sid already defined in
/var/www/html/horde/lib/Prefs.php on line 91

Warning: Cannot send session cache limiter -
headers already sent (output started at
/var/www/html/horde/lib/Prefs.php:91) in
/var/www/html/horde/lib/Prefs.php on line 91

I could not find these specific messages, in the
Troubleshoting section of the Admin FAQ on
horde.org Can I do anything about these ?

Regards,
--fzs