At least he's having fun with it, if Jesse Jackson (or someone from the ACLU) gets a hold of this there will be a class action suit.
My guess is that they (Wanda and Desi) are too back-lit by the fluorescent lights behind them. The back-lit problem isn't enough to render Wanda unrecognizable, but it is enough to "hide" Desi's facial features, making him unrecognizable to the camera. It sees him more as a silhouette because the camera is metering and exposing for the light behind him, not actually on him.
Or maybe it because these computers are intelligent and refuse to recognize Obama as president?
On the record, I'll go with the my "back-lit" explanation. Off the record...
Also, is it me, or does Desi sound exactly like Will Smith?
http://www.youtube.com/watch?v=_IFabwB-b14#noexternalembed