Originally Posted by DaleDe
Apple has also adopted HTML5 as their standard so it is not too surprising that they want CSS3.
True, but basically that has nothing to do with ePub of course. For browsing and their apps, fine. But ePub does not support HTML5 and CSS3 at the moment.
It isn't that hard to support the default specs if you already have support libs for HTML5 and CSS3. It is just that they don't want it.
You already see it in the discussions here. People blame the Nook, Sony or the format when they should blame Apple and/or iBooks when things do not work.