I meant it's odd since I've had OSX and Classic ticking along so nicely for about a year now. Then suddenly this inconvenience appears. You're right... I know how to trouble shoot the extensions, I was just hoping that some else had seen this. Thanks for the tip on starting with the hardware controlers. Cheers, John > No, it's not odd. OS X and OS 9 are two different operating system. > Classic is an evironment which emulates OS 9 under OS X. Therefore, > it's quite natural to see different behaviours -- especially when it > comes to hardware, which is controlled in a very different manner. > Solution? You know it -- enable extensions one by one (or use the > half-and-half method) until you locate the troublesome one. I'd begin > with hardware enablers or controllers. >