Since switching to Leopard, often when I wake up my Macbook Pro from sleep the visual interface of the OS lags. The mouse is jumpy, so is the dock (as if they were moving at a very low frame-rate). During this, the CPU remains largely unused, and other programs function just fine; ie scrolling in Safari is smooth as ever. Has anyone else had this problem? Is there a permanent fix, or even some way to fix it without restarting?