Apple CFO Peter Oppenheimer announced today that iTunes store revenue was $1.8 billion for the third quarter of 2012, which is down $100 million from last quarter, in which Apple took in $1.9 billion.
The ecosystem is still healthy, with 650,000 apps in the app store, 225,000 of which are optimized for iPad, but the $100 million decrease in revenue is somewhat astonishing.