I've had some weird issues with the .40 beta 1 firmware as well as the .39 releases and the official 3.0.0.4.374_4561. When beamforming is enabled and I connect with AC triple stream from my MBP I get packet loss, a serious one around 4%. Running constant ping I can see that every half a minute the rtt goes above 1s, then it drops a few packet and after that it goes back to normal (<1ms). When I disable beamforming the packet loss goes down to almost normal levels significantly below 1%. Why would beamforming cause this issue? Could it be related to the ac adapter in the MBP? Anyone else experiencing similar behavior with other wireless cards?
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