Oooohhhh… a test?! I didn’t study!
The source is always.flv (aka YouTube movies, etc).
Yes, DVD Flick did 'em all.
A/V Codecs unknown (whatever DVD Flick comes with?).
I don’t know much about bitrates, so I always leave most settings at the default… but everywhere I see the word “Bitrate”, it says “Auto” (or “Auto-Fit”).
It’s very rare; twice on neighbor’s box and about 4x on mine. I wish I remembered which movie(s) it happened on, but they shouldall be basically the same (with exception of the blank discs; brand; -R vs +R).