Thanks for the replies Guys
All my DVD's are original, scratch and fingerprint free, as many of them It was the first time I viewed them.
I'm pretty confident the freeze doesn't happen in chapter changes those tend to happen in "natural" scene changes in the film.
I notice the "freezes" mainly in "Action" or movement scenes.
You are right usually I only notice one or two Freezes in most movies ........ but "Mr Vengeance" easilly had a dozen+ Freezes...
I guess the Hitachi strugless with "Dual Layer", so I'll watch out for that when I buy the next machine.........I can always hand this one down to my Kids

One further question:
Can I take it that any decent model DVD player or Home entertainment system will NOT have a "freeze" when processing dual layer? or is there something "Technology" wise I should look for when considering the next model?
Thanks again for replies, much appreciated
Zipper