Old Notes:

On Chips, ssn 1, disc 5

mplayer -noconfig all dvdnav:// will load the menu in aspect 16×9, then when you hit enter to play the first one, the audio is sped up, spits out a lot of errors and eventually crashes. Adding -nosound will playback video at normal speed.

New Notes:

Haven't tested this one to see if it's still present. libdvdnav flaking out if aspect ratio changes was not unusual back in the day.