Hi, My White MacBook 4,1 (summer 2008) has recently started to have big problems when I watch on-line video from within a browser. What happens is: -Launch browser (same behaviour with Firefox, Safari, Opera) -Watch video -Video behaviour gets jumpy -Spinning pizza wheel arrives -Browser crashes I have tried a reinstalling Snow Leopard, disabling the browser add-ons, running the browsers in safe mode and I get the same pattern of results. I guess it is a hardware fault but I do not know how to identify the fault. System Profiler tells me my RAM status is "OK" and there are no obvious faults anywhere else in system profiler. Help please!