Happened to me today. I'm running beta10 (note: NOT beta10a), I had just started the car, unit came up in slo-mo mode. Audio sounded/played fine but the visual (funnelweb) was amazingly slow -- changing once every 3-4 seconds, at best.

Powering down the unit (via the button console) and then turning it back on did not help. Removing the unit from its sled and then re-inserting it (forced powerfail) made the problem go away.

The fact that the audio was OK seems to lend credence to Tony's thought that it's a visual-related issue. I'm not sure what to make of the fact that a powerfail was necessary to rectify the situation...

-- Bleys

"If you would judge, understand." -- Seneca