Originally Posted by pdurrant
It doesn't look like they've changed anything, but I haven't bought a new book since updating, only checked that the tools still work on books previously downloaded.
@FizzyWater, @rdfry and @Hellmark: I re-downloaded an acsm of a previously bought book, and the tools worked fine on that. I see no reason why a newly book would be different. I haven't tried the B&N scheme as they won't do business in my country.
Edit: Forgot to mention that I also deleted the key file, and that the latest tools extracted it again without problems.