Final Cut Pro 5.1.3 is a maintenance release that resolves performance and other issues.
Render File Compatibility
Render files created on both PowerPC-based and Intel-based Macintosh computers
now work properly on either type of computer.
Keyboard Layout Issues Resolved
Final Cut Pro 5.1.3 adds several commands to the default keyboard layout that were
missing in the previous version.
Issues with Cross Dissolves in Nested Sequences Resolved
Final Cut Pro 5.1.3 resolves cases in which cross dissolves did not work as expected in
nested sequences containing still images with adjusted motion parameters.
For the complete information about FCP updates: http://manuals.info.apple.com/en/Final_Cut_Pro_5.0_lbn_z.pdf
