Hi,
In answer to your question about Skype, I did not cut and paste data from Skype into the phone field. I typed the phone number directly.
I am linking to a screen shot that should help resolve this issue; prior to this I provided the text from the generic server error.
To reproduce this error, all I have to do is complete all the fields and use a valid credit card number. Then it throws the attached exception. If I am indeed providing invalid input (which I am not) the system should never throw an unhandled exception. At worst I'd expect a friendly error message.
Thanks for your help on this.