I recently updated the Jekyll dependancy Directory Watcher from 1.4.1 to 1.5.1. (I'm using Jekyll 0.12.1, Jekyll-asset-pipeline 0.1.6 and Ruby 1.9.3p327 on OSX Mountain Lion.) The update to Directory Watcher sends Jekyll Asset Pipeline into a constantly regenerating loop. I'm not sure what needs to be fixed, Directory Watcher or Jekyll Asset Pipeline, but I'm filing this here for starters.
This one small issue renders --auto mode completely useless as it just stops regenerating because of the loop. A fix for this would be greatly appreciated.