The issue now appears to be resolved, and access to all Clio features should be restored. The last update from Amazon was:
"1:05 PM PDT Between 11:40 AM and 12:56 PM PDT we experienced throttling errors accessing Amazon S3 in the US-EAST-1 Region. This issue is resolved and the service is operating normally."
Sep 14, 13:10 PDT
Update from Amazon:
"12:49 PM PDT We are now seeing recovery in the throttle error rates accessing Amazon S3. We have identified the root cause and have taken actions to prevent recurrence."
Sep 14, 12:51 PDT
Amazon has posted a further update:
"12:38 PM PDT We continue to work towards resolving the increased throttling errors for Amazon S3 requests in the US-EAST-1 Region. We have identified the subsystem responsible for the errors, identified root cause and are now working to resolve the issue."
Sep 14, 12:41 PDT
Amazon is currently investigating the root cause, and posting updates under "Amazon Simple Storage Service" on their status page here: https://status.aws.amazon.com/
Their most recent update:
"12:21 PM PDT We can confirm that some customers are receiving throttling errors accessing S3. We are currently investigating the root cause."
Sep 14, 12:23 PDT
An issue with Amazon’s servers may cause issues with Clio’s Documents, Reports, and a few other features which rely on this service. We are attempting to mitigate the impact as much as possible until Amazon has resolved the issue
Sep 14, 12:02 PDT