Reports have emerged that Apple has indeed begun seeding a new build of OS X Mountain Lion 10.8.1 to developers. Build 12B17 is still in beta stage, and it comes less than a week after Apple began seeding the initial build of 10.8.1. This new build has no known issues, and Apple is asking developers to focus on Active Directory, Microsoft Exchange in Mail, PAC proxies in Safari, SMB, USB, and issues related to Wi-Fi and audio when connected to an Apple Thunderbolt Display.