Since updating to version 1.0.5, I fall through when I try to taxi on the bridges of taxiways A and B east of Terminal 8, crossing the JFK Expressway. The taxiway bridges A and B southwest of Terminal 8 (crossing the Van Wyck Expressway) work, although they are a bit bumpy.
At least I assume that I am already in version 1.0.5, since the manifest file (as described here) still shows version 1.0.2 for me.