I've only had my Mac for about three months after years of suffering through Windows. I'm still learning the Mac-way. A couple of times (like just now) I was reading a page on the web when the process hangs and a pinwheel pops up. On Win you could hit ctl-alt-del and cancel the operation. Is there any such combination on Mac? The only way I've found to clear the operation is to turn it off since it is not responsive to any key or key-combination I've found. I'm running Leopard on a G5 Powermac with 2GB of Ram and my browser is FF 3.0.7. Many thanks.