I have been struggling for about a week to download arXiv articles as mentioned here: http://arxiv.org/help/bulk_data_s3#src.
I have tried lots of things: s3Browse
s3Browse
For me the problem was that my IAM user didn't have enough permissions. Setting AmazonS3FullAccess was the solution for me.
AmazonS3FullAccess
Hope it'll save time to someone