After upgrading to the latest firmware for P3P (1.2.6), I finally got up the nerve to test fly with VPS off.   Went through running the gambit in an area that I've done several times before, but noticed that post update, that I suddenly go from full bars on transmission strength to 'Loss of Signal'.   We're talking distances of only 300 - 400 feet.  Very depressing since with 1.1.9, I could fly easily 2 to 3 times as much without issue.

How does it go from full strength to nada?  

The handling seems different (or off as well).  If given the option I would absolutely revert to the previous firmware - absolutely no issues with that one.

I had my first ever loss of signal on 1.2.6. On 1.1.8 it never lost signal. Also, with App version 1.2.0 I had my first app crash with using the right controller wheel to adjust exposure.