I noticed the 15/16 Tyrolia tech manual lists the toe stand height of this year's PRD 12 as 1 mm higher than in years past (13/14, 14/15) and, correspondingly, the delta listed for the binding has decreased from 5.5 mm to 4.5 mm. Has there actually been a change to the LX toe or base plate, or have they just corrected an error in their tables? I suspect the latter, since I've previously measured the delta of the PRD 12 as about 4 - 4.5 mm.
The same change can be seen in the data they give for the PRD 14, which instead uses the Aero toe (the delta's also been decreased from 5.5 mm to 4.5 mm), but I've never measured the PRD 14.
The only change I'm aware of, for 15/16, is to the ski brakes.