Error upon publish

After upgrading to 2.0.3, I began to see this message when I publish a post or edit a post. Granted, my post still gets published, but it still ends up giving me this error:

Fatal error: Allowed memory size of 8388608 bytes exhausted (tried to allocate 500001 bytes) in /home/virtual/site202/fst/var/www/html/wp-includes/class-snoopy.php on line 901

Any ideas?