Hi guys, Some times (not very often) suddenly the desktop darkens, and the menu bar and the disktop icons disappear, while the dock remains. I have to click in order to return! What causes this thing? P.S. Before awhile, that this happened again, I looked at the console and saw these two events: 1)**** [IOBluetoothHostControllerUSBTransport][SuspendDevice] -- Suspend -- suspendDeviceCallResult = 0x0000 (kIOReturnSuccess) -- 0x3000 **** 2)setPresentationOptions called with NSApplicationPresentationFullScreen when there is no visible fullscreen window; this call will be ignored. But I cannot specify the exact time it happened, in order to see if any of those two messages are related.