I just purchased an iMac yesterday after years and years of Windows machines. I have always used Nero to burn dvd's with downloaded avi/divx files and they played fine on my various dvd players. Now the Imac, I downloaded a tv show avi file and burned it with the default Apple software. I ended up with jerky playback on my dvd player. I tried the same file through Toast and still had a jerky playback. I actually tried twice through Toast with one as data and one as divx - no luck. I am not doing any encoding - just burning downloaded files as is. I know someone may say try different media but I have used the same discs that have played fine on all my players through windows xp and nero. Any thoughts? Luckily I still have my older windows unit around.