Error conflicting with other plugin PHP Fatal error: ob_start()

I have another plugin that apparently is also using ob_start and I cant use WPMU DEV SEO because on the page controlled by the other plugin errors out.

[Thu Jul 21 12:29:47 2011] [error] [client xxx.xxx.xxx.xxx] PHP Fatal error: ob_start() [ref.outcontrol]: Cannot use output buffering in output buffering display handlers in /var/www/vhosts/domain.com/httpdocs/wp-content/plugins/events-manager/em-events.php on line 35[Thu Jul 21 12:29:47 2011] [error] [client xxx.xxx.xxx.xxx] PHP Fatal error: ob_start() [ref.outcontrol]: Cannot use output buffering in output buffering display handlers in /var/www/vhosts/domain.com/httpdocs/wp-content/plugins/events-manager/em-events.php on line 35

Is this resolve-able? I really want to use WPMU DEV SEO but the other plugin i Have to use.