Hi there! I recently upgraded to OS X Mavericks. Since then my wifi disconnects whenever the screen goes black after not touching it for a while. This is extremely annoying when I for instance am on Skype just talking to a friend and not touching my computer. Then it'll eventually just disconnect, because I did not touch my mac. Before it'd never do this. I'd stay online even when the screen went black. How do I change this? Thanks in advance!