We're having trouble with an error caused by the Polldady shortcode plugin within Jetpack.
[Fri Sep 16 09:31:12 2011] [error] [client xx.xxx.xxx.xx] PHP Warning: Division by zero in /clients/xxxxx/www/wp-content/plugins/jetpack/modules/shortcode
s/polldaddy.php on line 144
Within 5-10 minutes after this error the site will crash. Trying to weed out possibilities and narrow down the cause of the crash.