I was going to start a new post for this but as this topic closely related, I'll ask it here.

I'm a huge fan of Metropolis, I bought the complete version when it first came out and I recently picked up the Moroder version. After watching it, it kind of sparked my interest in trying to collect some of the other versions from over the years, but I'm really confused about the content of all the different versions that exist. Some seem to be the same cuts as others only with different sound tracks while others are entirely different cuts. And to make matters more complicated, the versions I see listed on amazon, don't seem to give any indication of which version they are. Are these versions all the original US cuts or do different distributors have different cuts? Is the UFA re-cut available?

Is there a comprehensive history of the films different version and releases somewhere on the web?

I know obtaining every cut imaginable is probably impossible given the crazy history of the film, but getting my hands on the major ones would be nice.

Any help sorting out this mess would be much appreciated.