I said before that I'd test using section breaks instead of page breaks in Word, convert it to Kindle format (.prc) and test it in the Kindle Previewer. I did that, and yes, the section breaks did convert into page breaks on the previewer. So, if you're formatting for Kindle and Nook, just use section breaks to start with and save yourself some time.
For the record, I was using MobiPocket Creator for the conversion.
Labels: page breaks on ebooks, page breaks on nook, section breaks on kindle