This release includes a patch by Klaas Jan Wierenga : under a certain level of stress, schedule/unschedule got shaky for at/in/every jobs.

http://groups.google.com/group/rufus-ruby/browse_frm/thread/6a45a98fd673a098

Note that the next release of rufus-scheduler will be a 2.0 (and include an EventMachine mode).

http://github.com/jmettraux/rufus-scheduler/