I'm hoping someone here can help me find BCM43xx ver 5.100.98.78 which apparently came out on 6/16/2011. I'm currently using ver 5.100.198.22 and it still hasn't resolved my issue of connecting to my 5ghz network. It can see the network, but cannot connect. Booting up this same hardware to Lion (Mac Mini) allows it to connect to my 5ghz network so I know it's a driver issue.
If I can help by uploading my current version 5.100.198.22 somewhere, let me know. I'd love to try the newest version available and see if it resolves this issue.