I'm having a heck of a time getting Shuttl to run with my S3 buckets. It appears that the problem is in the fact that my AWS Secret key has "/" in it, and that shuttl is using the basic auth
I've fixed that in the latest release, 0.8.2.
Get it here: http://splunk-base.splunk.com/apps/58003/shuttl
I apologize that I haven't seen this question until today. I should get email notifications now, when someone posts a splunkbase question tagged with Shuttl.
Can also be reached at: https://github.com/splunk/splunk-shuttl/issues
Thanks - Petter, Shuttl Developer