RE: futaba haters rejoice
We had a guy at the field last year that was getting hit over the same part of the field. He too lost more than one plane. Turned out that one receiver antenna had broken completly off and the second dropped in his hand when he touched it. His was a Spectrum though. We figured that his problem was that with one antenna dead, that spot at the field put the plane with minimum signal. Don't know if this has anything at all to do with your problem, but it is worth a look, or just send in the RX for a checkup. By the way, the antenna wires broke at the solder joint to the PCboard.
Don