Battle.net client is denying Credit card transactions to a card that was working just fine last week. Contacted the bank, they see no issues no problems. Is your black friday sale system overloading the network? I had to use paypal to get what was needed.
Bit frustrating.
edit: Bank called, appears theres an argument with their security measures and blizzard being out of CA and the holidays coming up. shrugs hopefully things are fixed now.