We’ve recently bumped our rails gem with the below fixes.
https://rubygems.org/gems/airbrake .
Version 3.1.2 - 2012-06-23 02:27:01 +0200 =============================================================================== Hrvoje Šimić (5): routing errors ignored by default, for #92 use simplecov for test coverage fix features for javascript ignore user agents in rack, closes #61 error out if controller is undefined