On the Panasonic BD60 player, the right navigation doubles as a frame-by-frame advance for when the player is in pause mode (ie rate of 0.0).
It only enables this functionality until menu graphics are drawn to the screen. So there is a window of about 1second where this behaviour can be seen.
Is there anu UO to prohibit this? Alternatively can the cursor forward UO be prohibted from within the java code, and then set to be permitted again via java?