Why export audio to movie command not visible and detect cuts command is not working in 64bit mode?

Does anyone know why export to audio disappear from menu in 64bit mode?

Why detect cuts command is not working well in 64 bit mode?

I tested on several machines (brand-new iMac, brand-new MacPro with 10.8 OS, MacPro with 10.6.8),and everythig wotks in 32 bit mode. As I switch to 64 bit mode detect cuts only put one marker at the begening of film.

I also noticed that Firewire output option in 64bit mode is not avaible.

Is there a certain film format that I have to use to make it work? I tried DV PAL, but I had ther same result.

Thanks a lot.