> A side by side > comparison of what behaviour your proxy has when StoreID is used and when it > is not will probably also be useful in figuring it out. What I've noticed so far is: 1. Running the same video on 1 browser at a time - no problem, and I see a HITs after the first time. 2. Running 3 browser sessions on same video at the same time without StoreID - no problem. Slower, but runs to completion. 3. Running 3 browser sessions on same video at the same time with StoreID - 1 or 2 of those browsers sessions will halt with "an error occurred..., please try again later", while at least 1 will run to completion with no problems. No errors in cache.log. I'm just looking for ideas at this point, and I'll try to narrow it down a bit more. Any debugging that might be helpful?