I'm seeing a lot of this in my logs:
[Wed Mar 07 07:13:22 2012] [error] [client 184.108.40.206] PHP Fatal error: Cannot use object of type Request_AccessLogEntry as array in /var/www/phpwiki/lib/plugin/RecentReferrers.php on line 69
[Wed Mar 07 07:13:22 2012] [error] [client 220.127.116.11] PHP Fatal error: Class 'DB' not found in /var/www/phpwiki/lib/pear/DB/mysql.php on line 207
Once that starts happening the class DB not found error keeps happening over and over again. My website still seems o be up and working though. There's also lots of this sort of stuff intermingled:
[Mon Mar 05 00:30:44 2012] [error] [client 18.104.22.168] File does not exist: /var/www/ImpossibleEmailDates
the problem goes away for a while after I restart my apache2. I'm using the mysql backend and the svn phpwiki as of about feb. 24 2012. php-5.3.