I also have very positive results with 140402: my MacBook Air connects at proper ac-speeds after every resume.

I had 140307 running ok with my MacBook Air for a few days (transmit rates always > 780Mbps) but today, the transmit rate on ac is again only 7Mbps. Can't make heads or tails of it. And none of the...

The 140307 image can be downloaded from my Google Drive: https://drive.google.com/file/d/0B3M0sSVkm2FsUklCRGg3VUNGVFE/edit?usp=sharing