Originally Posted by
Seat62K
A few days ago, when booking flights, a pop-up appeared telling me to try again (because of problems with card number, cardholder name, expiry date etc.). This was on the page which clearly had "confirmed" and a confirmation number. I also had a confirmation email. ... Luckily I ignored the pop-up but at the time did wonder if I'd done the right thing.
I'm a suspicious cynic: I wonder if that was a bit of malicious phishing spyware on your computer that triggered that?