First time poster (long-time lurker) here...
Regarding the Samsung BD-J5700, I noticed when watching the Star Wars blu rays the video will randomly lag behind everything else for around half a second. The image on screen will freeze for a moment, then "catch up" to the audio. There is no disturbance in the audio while this happens. Oddly, it's not repeatable when the disc is restarted or the scene played again, but it then happens again elsewhere. It seems to occur anywhere from 1 to 6 times per viewing, always at different points in the movies.
Doesn't matter which of the 6 Star Wars movies it is (I only noticed it with my Star Wars movies, but someone on another forum mentioned this problem with the 25th Anniversary Home Alone blu ray disc). It also doesn't matter what TV I play it on (tried on 3 separate TVs - 2 Samsung plasmas, one LG LCD), it doesn't matter which HDMI cables I use, and it doesn't matter what player I use (my house has two of these BD-J5700 players).
I contacted Samsung, and they just gave the predictable "make sure your firmware is up do date, blah blah blah" response. Yes, my players and TVs are up to date.
Anyway, it's a strange glitch with these players (or Star Wars discs) that I discovered and haven't encountered before and have not seen mentioned here.