As described in this article from 2005 Capital One has done some shady things in the past in the way they report to credit bureaus. Specifically they don't disclose your credit limit to the credit agencies forcing them to use your highest balance as a proxy in your credit score calculation. If you never charge much on the card it will result in an inaccurate credit utilization ratio that hurts your credit score.
I'd pretty much sworn off using cards from them because of this, but they have a really excellent cash back card that I'm considering now and I want to know if they have changed their practices since 2005 regarding disclosing credit limits to the agencies. Does anyone here know?