After installing the current version I got this error message:
user warning: Table 'xxxx.schedules' doesn't exist query: SELECT * FROM publications p LEFT JOIN schedules s ON p.publication_id = s.publication_id ORDER BY p.type in xxxx\sites\all\modules\enewsletter\extras\subscribe_members.module on line 37.

Problem: the table in the subscibe module is named: 'schedule' in stead of 'schedules'.