I've been using Popcorn for years and have never had a problem playing the discs in the DVD players I've owned (Old Composite Sony & Memorex Progressive Scan.) I recently bought a HDTV and a LG-798 1080p upconverting player. The discs that I've burned with Popcorn will not play in the LG player (Skipping + Out of Sync Audio). I tried hooking the player up through composite cable with playback resolution of 480i and it's still out of sync and dropping frames but with grainy-er video. I've been to the store for two other 1080p upconverting players (a Memorex and a Samsung) and I'm having the same issues with each player. I don't want to have to keep two players hooked up to my TV...Anyone have any ideas? Thanks in advance.