We've experienced a partial outage due to issues at AWS, our network infrastructure provider.
Starting from approximately 20:07 till 20:25 UTC there was an increased error rates for Upload API and on CDN origins.
Due to the nature of the issue, our error reporting systems didn't notice Upload API problems:
We were only aware of CDN origin problems until some of our customers reported issues with Uploading.
Underlying issue is quoted below:
Instance launch errors and connectivity issues
01:49 PM PDT Between 1:06 PM and 1:33 PM PDT we experienced increased error rates for new instance launches and intermittent network connectivity issues for some running instances in a single Availability Zone in the US-EAST-1 Region. The issue has been resolved and the service is operating normally