The memcached-based failure throttle applies to originals that fail more than 3 times in 1 hour. However, this throttle is not reset when a new version of a file is uploaded. This can be confusing for users that try to fix erroring files, as the new version will appear broken for the rest of the 1-hour throttle duration.

When a new version of a file is uploaded, the failure throttle for that filename should be reset.