MP has always had issues playing DVD's, at least at our place. Even with MP 1.5 and all LAV filters, most DVD menus will not work. I'm always having to rip the DVD main movie to hard drive before we can watch a rental movie. It's a real pain. A small number of DVD's we can just click the up or down arrow and it appears. Anyone know if a solution is coming. It is a basic requirement of a media player to play DVD's out of the box.
My earlier install of MP 1.3 under Windows XP on a MacMini also had problems initially, but once I went to 1.3 or somewhere they all disappeared. When previously you wouldnt see the Menu options or you'd get no Video it all started working well. Have since gone to Windows 7 and MP so probably cant really compare.