i am currently running 1.5.2 and seem to be getting the same error for a calendar
here is the error that is thrown.
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 10 bytes) in /var/www/webfeatgoo/application/models/project_tasks/base/BaseProjectTasks.class.php on line 77
This error is only on one of the workspace calendars that has many taks on it.
any help or direction on this would be great