Consumerist is pointing to the claims of a guy who noticed that Capital One offered him really different car loan rates, depending on which browser he was using. He was using Firefox, and saw a rate of 3.5%. That was different than a rate promised to him in an email, so he thought perhaps the calculator wasn't working properly in Firefox (since he was using the beta version of Firefox 4). So he opened up Safari... and got a rate of 2.7%. Then he checked Chrome: 2.3% and Opera: 3.1%. No word on how much more (and you know it would be more) you'd have to pay if you used IE.

I just tried it myself and saw the same thing. Here's the loan rate page if you'd like to try for yourself (link below). For me, it's 3.5% in Firefox and 2.7% in Chrome. I found an old machine that still has IE... and it's actually showing the same Firefox rate of 3.5%. I also checked it out with Dolphin Browser on my Android phone... and got offered a 2.3% rate. It's kind of strange. A commenter on the Consumerist article suggests it's random - saying that if you reload, you get different rates, but that doesn't appear to be the case for me. It might be that the initial display is somewhat random however, though that does seem like incredibly misleading advertising from Capital One...

http://www.capitalone.com/autoloans/help-center/loan-rates.php