Took a pair of B5 lites from 1.4.1 to 1.4.4 today. Link is just under 1km and is using a 40 Mhz DFS channel. Prior to the firmware upgrade, signal was -57 and I had solid 9 MCS on both streams in Tx and Rx.
After the 1.4.4 upgrade, I have a -64 signal and my Tx MCS is moving from 9 to 5 and everything in between constantly. I have tried a couple channels and no change. Noise is -91 and SNR is 25. Both channels I have tried are totally clean.
Anyone else seeing any MCS fluctuations in 1.4.4?