I have a decent enough grasp of the differences overall in how films are handled for different areas, so I'm not looking for a primer per se; however, I would like some clarity on how this works and have some examples to share.
Background: For some reason I've had the desire to watch the "Creating the World of Harry Potter" documentary that was an exclusive of the "Ultimate" editions of the home releases in the US. Given that I owned a few of the blu-rays already I balked at repurchasing these overpriced editions. I did stumble across a listing in the UK Amazon store for a Region-Free version of the entire 8-film collection and the documentary for approximate $40 USD. This is a good $100 cheaper than I could find in the states and so I made the purchase.
Thinking I got a good deal, I started to hunt for other region-free sets that were incredibly priced and I bought Battlestar Galactica, Star Trek TNG and a 6 movie collection of Kubrick films before I stumbled across this thread:
As discussed here there seems to be dialog surrounding 25fps vs. 24 fps, pitch correction, and ever more dialog in this thread surrounding NTSC vs. PAL playback.
NOW, given all this, my question is:
How are films that are supposed to be different FPS or formats prepared for region-free versions and do those versions have concerns that should be investigated when importing to an NTSC region?