Maintaince problems

[Harry Hoffman]

Hey All,
  I've been updating thru CVS pretty frequently and so I'm not sure
where/why this error is happening. I logged into IMP today and was
presented with the option to perform maintaince operations, (ie ->
move/rename sent-mail). I've got the following error, can anyone help?

The requested URL /horde/<br><b>Warning</b>: unserialize() failed at
offset 8 of 35 bytes in <b>/var/www/html/horde/lib/Maintenance.php</b> on
line <b>388</b><br><br><b>Warning</b>: Invalid argument supplied for
foreach() in <b>/var/www/html/horde/lib/Maintenance.php</b> on line
<b>389</b><br>/horde/imp/mailbox.php was not found on this server.

Is this a matter of updating PEAR??. I got PEAR from php cvs about 1 week
ago.

Thanks,
Harry

php-4.0.6
redhat-7.1
mysql-3.23
ldap-2.0.11
IMP/HORDE/KRONOLITH/TURBA from cvs.