> Some sort of error in how we measure the variations in the CMB. IIRC, the prediction that comes from the CMB depends on the lambda cold dark matter model, an

> Some sort of error in how we measure the variations in the CMB. IIRC, the prediction that comes from the CMB depends on the lambda cold dark matter model, and there are plenty of independent reasons to be skeptical of that model already. If I were betting which one's most likely to be wrong, that's where I'd put my money.