Considering the price of the blades, I don't have an issue with an occasional bad one. I'd much rather get a bad $0.75 blade than a bad $2 one!
I just opened a new pack of the HF blades, the first one must have had a burr on it as it would skip every so often. I tried sharpening it, but I think my sharpener is too far gone to be useable at this point, since that only made the blade worse. So I chucked it & put another blade on my cutter, and it worked fine.