pifantastic/grunt-s3 — pull request #114 by sampsasaarela (2013-12-30 09:11:25+00:00)
Title: Fixed bug which broke headers

When I uploaded multiple large files with option maxOperations=5 headers (especially Content-Type) messed up. This fix solved my problem.

Could be also relevant with issue https://github.com/pifantastic/grunt-s3/issues/100.