iChat with clean install of Lion, video slow on Core2 Duo

After a clean install of Lion on a newer iMac things are MUCH faster than when I had installed it OVER Snow Leopard.

However, ichat video is about 1 second slower than the audio and frame rates (of my own video) are about 5 frames per second.

Full screen makes it worse.

Anyone have any ideas? I have not installed any files or apps (except Flash for safari).... this is a FRESH Lion install from the Apple USB Lion. Wiped drive prior to install.

Definitely frustrated with 10.7.... and I have it on 3 different Macs.... wishing I didn't.