markpundsack/heroku-buildpack-jekyll — pull request #1 by scharan (2012-06-22 00:01:02+00:00)
Title: Default to UTF8 charset.

I had the problem described [here](http://stackoverflow.com/questions/8089129/heroku-invalid-byte-sequence-in-us-ascii-argumenterror) on Stackoverflow. The solutions discussed there were independent of buildpacks.

Simply exporting LC_ALL & LANG env variables fixes the problem for me.