I can at least corroborate the asterisk issue. Sometimes i type replies in the notes app, C&P and have to go delete the asterisks. Seems like it corresponds to spaces and/or returns.
Safari on the other hand... never had as many crashes as you describe. But i only keep three pages open at max - and only temporarily. That's a habit left from the 1.1 days. What's the point of keeping pages open if they just reload when you switch back to them? If i want to save one, i bookmark it and be done with it. Doesn't really take that long - it's two taps. But i know that's not an answer you want to hear.
Safari on the other hand... never had as many crashes as you describe. But i only keep three pages open at max - and only temporarily. That's a habit left from the 1.1 days. What's the point of keeping pages open if they just reload when you switch back to them? If i want to save one, i bookmark it and be done with it. Doesn't really take that long - it's two taps. But i know that's not an answer you want to hear.