Yes, a ton. The big issue for me was Does key exist? -> No -> Upload object with key. Followed by Get key -> Not found. Less rarely, I'd see Upload object f

Yes, a ton. The big issue for me was Does key exist? -> No -> Upload object with key. Followed by Get key -> Not found. Less rarely, I'd see Upload object followed by an overwrite object, followed by a download download some combination of the two if the download was segmented (like AWS's cli will do). The first one happened often enough to cause problems, the second one was a fairly rare event, but still had to be handled. It might have been more of an issue with "large" buckets. The bucket in particular where I had to dance around the missing object issue had ~100 million fairly small objects. I ended up having to create a database to track if objects exist so no consumer would ever try to see if a non-existent object existed. Time to revisit all that mess, I suppose.