Apple Final Cut Pro 7 - Manual (Page 1491)

Working with Cinema Tools and Mixed-Format Sequences
Mixed-format sequences are not recommended for use with Cinema Tools. Mixed-format
sequence playback does not perform 3:2 pull-down removal, deinterlacing, or accurate
timecode or keycode tracking of your clips. If you are editing film-based media in
Final Cut Pro, you should use any of the suggested workflows described in the Cinema Tools
User Manual, avialable in Cinema Tools Help.
1491 Chapter 86 Working with Mixed-Format Sequences