Apple has just released Mac OS X 10.6.6 for Mac OS X developers. Yep, 10.6.6. – 10.6.5 is not even out yet for the public. Apple says there are no known issues in the 10.6.6. release but developers should focus on this:
– Contains developer support for fetching and renewing App Store receipts. See “Validating App Store Receipts” for more details.
Strangely, the download is only 3.7MB. Apple seeding 10.6.6 (build 10J521) to developers only means the 10.6.5 update is coming very soon and is likely 10H568.