Hi jeobedoza,
I'm sorry to hear about the difficulties you are experiencing. I am not aware of any current technical difficulties which would cause you to receive an “Unknown Publisher” warning when attempting to upload images into your account, but we will be happy to help troubleshoot the issue with you.
If you are still in need of assistance with this, please contact our Customer Support team directly from under the “Help” tab within your account and we will do out best to help you out.
-Mike