I have Ethernet connection hooked up to my 13 inch black macbook. I turn on Wireless Internet Sharing via Airport and it works but it would stop working on its own couple of hours later. Sometimes when I turn it on it does not work. Sometimes I turn it on, it works until I turn off the machine. It's very very unstable. I usually remedy the situation by restarting the machine but sometimes that does not even cure it. It would turn on, work for a while and stop working hours later. The sharing logo on the top right bar stays on. But it does not let anybody have wireless internet. sounds like a big bug to me. or my hardware is faulty. But that cannot be because wireless works 100% of the time with other routers. has anybody experienced this before? I know internet sharing is not a prominent feature on the mac os but if they build it, they might as well make it so it does not cut people off when it feels like it. Seems like a easy thing to do.... *** EDIT My laptop does not go into sleep mode UNLESS I close the lid.