Originally Posted by Mikest:
Just the gmail account which is set to "as it arrives"
OK, someone mentioned that all their accounts seemed to synch to the same timing despite being set separately. See my edited post above. There is still some Hotmail quirkiness, but at least it no longer fries the phone.
By the way, another quirk I've seen is it placing new mail under the "yesterday tab" while never showing any new mail on the today tab. I deleted the two mails that got stuck on today and it hasn't done that since.