If you see your log (and mailbox) growing in MBs each hour, check the permissions.
It's very easy to oversees the permissions and soon your server can ending up with huge disc space wasted.
My advice:
After install, keep a closer look to your logs for a couple of days.
After I corrected the proper permission to 755 and cleaned over 10,000 messages in my mailbox, now my log and email box is flooded again with the following:
PHP Notice: Undefined index: HTTP_HOST in /var/www/html/camp/include/campsite_constants.php
on line 20
PHP Notice: Undefined index: default in /var/www/html/camp/template_engine/classes/CampSession.php
on line 199
PHP Notice: Undefined index: default in /var/www/html/camp/template_engine/classes/CampSession.php
on line 199
PHP Notice: Undefined index: session.timer.current in /var/www/html/camp/template_engine/classes/CampSession.php
on line 199
PHP Notice: Undefined index: session.timer.finish in /var/www/html/camp/template_engine/classes/CampSession.php
on line 199
PHP Notice: Undefined index: session.counter in /var/www/html/camp/template_engine/classes/CampSession.php
on line 199
PHP Notice: Undefined index: session.counter in /var/www/html/camp/template_engine/classes/CampSession.php
on line 199
PHP Notice: Undefined index: system_preferences in /var/www/html/camp/template_engine/classes/CampSession.php
on line 199
Have someone tha same issue? How you solved this?
BTW, I'm using PHP 5