I have an ongoing case with Apple regarding my two revision A MBAs that have horrible video stutter with both iTunes purchase video and small online flash video (both of which are fine even on my old G4 iMac). Despite this being a known, Apple UK customer relations have determined that the machines are within spec, though I know that a number of people have had their machines replaced with Rev. B machines due to this known issue. I am looking for a cheap video application that will do a screen capture so that I can mail the files to Cupertino and post them online. Any recommendations?