Indeed I have nothing against people that use Macs, just Apple. That is why I take the trouble to make an OS X version of calibre available (and believe me, it was a
lot of trouble thanks to Apple's policy of not allowing you to run OS X on anything but Apple hardware) - so that those who use OS X can use calibre on their OS of choice. Unlike Apple, I believe in giving users choice and freedom.
Maybe we should start a wiki page documenting iBooks quirks. And just to show that I'm not targeting iBooks, I have had for a long time a similar wiki page describing quirks in Adobe Digital Editions
http://bugs.calibre-ebook.com/wiki/ADEQuirks