CPC collapse the past day! What is going on?

Traffic up, CPC WAY down across the board, also down on Lijit.

December is low for me, surprise, it ended slightly above november.

I second what littlecubpanda said; cpc prices have been terrible the last 2 days.

The pattern continues. Horrible CPC on Adsense and lijit just up and decided not to show impressions anymore. This has to be some bottoming out after the holiday ad blitz, I'm just surprised it is this pronounced. Wow!