@gblair, all,
Thank you very much for letting us know.
Unfortunately, one day after the migration we can see that not everything is as smooth as we hoped for.
We're experiencing high CPU load on the new server. This may result in pages or uploads being slower, or even dropped if the server can't cope with the load. This is somewhat surprising as based on technical specs alone, the new environment should be performing better than the old machine. We're currently investigating the cause of the issue.
I think the result may be that if any of your pictures doesn't upload, simply giving it another try may be a workaround. There is presumably NO problem with your pictures.
Please keep me posted with any problems you may encounter.
/Martin