The patch is linked in the FAQ.
The "problem" is, that when you try to play a BD movie directly from the full BD menu, it doesn't switches the output frequency according to the video's original fps and the actual playback of the video stays and happens on the default refresh rate that has set for the GUI. I.e. in the case of a 23.976fps video it doesn't switches to 23.976Hz and will play back on 50 or 60Hz , that will result in micro stutters in the motion display.
So it's simply more reasonable to neglect the Menu patch entirely and rather choose to playback BD's without having it installed.