From the HISTORY:

• Fallback when unable to bind QUIT and USR1 for Windows and JRuby.
• Fallback when no Kernel.fork is provided (for IronRuby).
• Web: Rounded corners in Firefox
• Cut down system calls in Worker#prune_dead_workers
• Enable switching DB in a Redis server from config
• Support USR2 and CONT to stop and start job processing.
• Web: Add example failing job
• Bugfix: Worker#unregister_worker shouldn't call done_working
• Bugfix: Example god config now restarts Resque properly.
• Multiple failure backends now permitted.

Check the compare view, too.

Upgrade:

$ gem install resque

Find Resque on Gemcutter and GitHub.