M4R v1.14 - 23 January 2012
Fixed a problem wherein a sudden, very strong signal (e.g. transmitter turned on right next to receiver) yielded noisy audio until the antennas were moved.
M4R v1.13 - 10 January 2012
Corrected baseband filter width in 2 ch mode, for improved adjacent channel rejection.
M4R v1.11 - 15 September 2011
Added factory diagnostic serial commands.
M4R v1.10 - 09 June 2011
Fixed computational bug causing subtle defects in the audio noise floor.
M4R v1.03 - 24 Februrary 2011
First production release.