[Plugin: Events Manager] Fatal Error on loading all articles at the backend

hy!
i´m running WP 3.2.1 and events-manager 4.305

if i would like to open the article overview at the backend of wordpress i´ve got an fatal error:

Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 71 bytes) in /var/www/vhosts/ronny-r-kircheis.de/httpdocs/villa/wp-includes/meta.php on line 344

for testing i disabled the plugin and the error didn´t appears.

http://wordpress.org/extend/plugins/events-manager/