i reinstalled my OSX 10.4.4 and updated with the 10.4.10 combo updater, and had a few things go missing. i am on a PPC G5.
apparently the ScriptingAdditions folder was gone in (HD)>library>ScriptingAdditions
got it off an old HD running 10.3.9 and replaced it in the library folder.
the missing file is called Adobe Unit Types.
wanted to pass it along in case anyone else encountered it.
oh, and don't delete the system fonts off the system folder>fonts :/
cause some problems for me and i had to reinstall the OS.