I just signed up with Market and uploaded my app. On the next screen, it is asking me to upload assets. After i choose screen shots for the app and hit upload, it gives me a
Apparently the error is gone today. I sent them couple of emails and they replied back saying they have approved my registration. I guess its not them but it got fixed as the payment cleared from the credit card. If you have this issue, send them an email or wait till the charge is cleared off in the credit card.