I gave up on 0.5, gone back to 0.4.2. Too many find/replace issues - apart from the ones already mentioned I had other scenarios like for instance a regex find expression which works in 0.4.2 did not work for me in 0.5:
<style type="text/css">.*</style>
Maybe that is the new regex engine, but with a blank replace expression all that happens is the (existing 0.4.2 bug) of a blank line being inserted within the style section every time you click replace (and the style section *not* being replaced). Loaded the same book up in 0.4.2 with the exact same expression and it worked first time. It wasn't isolated - I had another major fail of Find All so my confidence is just lost with it.
Fingers crossed for 0.5.1...
