I'm not sure, but it appears these "spec" issues may also affect changes being made in Mac OS X. We had a G3-B&W go nuts (kernel panics) --- particularly after upgrading to 10.1.1. FYI - 10.0.x thru 10.1 worked fine without problems. Ran DIMM First Aid, reported that on DIMM0/J19 128MB module was 10ns.pc100-222 RAM but CL3 NOT SUPPORTED!! Removing this module brought unit back to life.