From the FanEdit.org/ifdb main page.

FanFix With a FanFix, the editor is typically attempting clean-up or otherwise modify the original so as to make it a more enjoyable viewing experience. Quite often this entails adding and/or removing portions of the movie, reordering scenes and in general, addressing aspects of story and/or character that detract from the movie. In general terms, a FanFix tends to be an effort to polish the movie, often removing contrivances added by studios or filmmakers which interfere with the story. The goal here is not to invent a new movie or narrative, but to clean-up the existing one and hopefully make the movie more enjoyable. Examples of FanFixes are havok1977’s Codename: Wolverine, gekko’s Mission Impossible 2: Disavowed and The Phantom Editor’s Star Wars: Episode I - The Phantom Edit.