When an application uses common to set bNoFsPowerUp, it actually ends up zeroing the 3rd bit of the rate word in the CMD_PROP_RADIO_DIV_SETUP object. We noticed this issue when running our CC1101 (low rate tx/rx) experiments. Our original rate was 0x5BC, after executing this line it was 0x5B8; this change in rate caused packets over a certain length to be incorrectly received, i.e. a CRC error.