powernap does not work

I have noticed the same issue. I do not know for certain about the wifi turning off but I do know that even with the power nap option turned on and the laptop plugged in, that it hasn't backed up or checked for new emails when closed and sleeping. I am not sure what the issue is. I have read some people reinstalling Mountain Lion and that fixing their problem. I'd hate to do that since I just finally got all my programs set up on my macbook pro. I guess I can do a TM backup then reinstall the OS then restore my documents. It sounds like a pain but maybe that is the only way?

I also noticed that finder was acting funny when I first got my laptop. I had to restart it for finder to remember preferences etc. I am not sure if that is also a symptom of what is causing this.

Apple support article:

Powernap - About

If you monitor the "More Like This" box (top right), other threads appear. Opening them usually displays other threads.

I looked through the other threads and also the about article but none of it seemed to pertain to my situation. I have the new 2013 Retina MBP. There is no SMC update for mine. I haven't found another article in the discussions (yet) that is similar to mine except maybe this one.

It seems that power nap started working. I am not sure what changed but it has started getting mail and backing up while the lid is closed.

Oh thank god.

K...