First I would like to say that this is my first post, and that I really like this site! I have learned a lot by reading the posts on this site. My question concerns DVD players and their compatibility with the DVD's. I read some posts concerning some dvd's that would not play on certain players (most recently the Holy Grail. Is this a common problem? Are there no industry standards for compatibility between software and players? And finally there was discussions concerning the upgrade of player itself. What does this involve and how expensive is it to do? I have a Toshiba 2109 which I have owned for two years and never have encountered a problem, is that normal? I want to get the 'holy grail' but if it won't play on my machine I'll have to wait on this movie. Thanks for any information that you may provide!