Just wanted to know if anyone else is experiencing this problem or might have any ideas on how to fix it. I have a brand new 2012 13" Macbook Air. This computer is great except for one thing. Waking from sleep in general is a bit unreliable. I've noticed that a lot of the unreliability is associated with my thunderbolt to ethernet adapter which I use while I am at work. Twice now I have plugged my macbook air into power opened it and wakened it from sleep. And then plugged in the thunderbolt to ethernet adapter (with ethernet cord attached). And then the computer completely freezes. Unresponsive. I can't put it back to sleep. Unplugging the adapter doesn't do anything. The only thing I can do is turn the computer off by holding the power button. Strangely it doesn't happen every time and after a restart I am able to get my MBA working with ethernet. This is a big problem as I need ethernet 100% of the time at work. I bought the thunderbolt to ethernet adapter from apple btw. I will of course call Apple and see what they say but I just wanted to see if anyone here had any ideas for a solution. I've already reset SMC twice.