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					Originally Posted by J. Fred Muggs  90% sure you added your oil too fast.  start with yolk and salt, add acid, start adding oil by the drop until it starts to emulsify and then add a small stream | 
	
 This is probably the right answer.  My answer is to make it in a food processor.  You get those eggs zipping around and with your hands free it is easy to add the oil slowly.