i watched JL's video http://www.youtube.com/watch?v=dBJLXGiBh8A&feature=plcp showing the new item elevators that are possible now that items travel upward when they are trapped in transparent blocks, and decided to try and attach a small one of these item elevators to a compact animal breeding unit.

For me, the behavior of the items is a lot more random than in the video. Rather then travelling straight up they would always fly off to the side, and fall out of the machine. I added more glass around the edges to try and fix this, and the wool got stuck in the glass by the pressure plate (even though that bug is supposed to be fixed).

i then broke the glass and was not able to pick up the items. I backed up for a screenshot. Then I tried to pick them up again, and the entire stack of wool disappeared completely. (i checked my survival inventory, and it was empty)

replicating this may be difficult, as it may rely on this particular design, as well as the position of the wool as it enters the machine