So, ever since I've upgraded to the newest version on Mavericks, I'm having an enormous paining the arse with my attempts at getting my MBA 2013 13'' 256 8 to go to sleep..! It started with the hot corner that made the display turn off, not triggering the sleep functions, which I thought "well, OK, maybe they meant to have it so I can listen to music with the display off". Since then, I've been "degraded" to having to press the power button for a couple seconds, then select the "sleep" option (closing the lid itself also did not put it to sleep). This morning, after having pressed the "sleep" option in the popup box, I wake up to a 0% battery.. Wonderful. Can anyone explain what's going on? I saw some thread in the Apple communities mentioning sleeping issues, but not quite since 10.9.2. Moreover, I have changed none of the settings I had on 10.9.1 (meaning, power-nap is only enabled on charge, hard disks are put to sleep when possible etc). So - any thoughts? Thanks!