Just six days after the release of Mac OS X Snow Leopard to the general public, Apple has begun extensive testing of the first update amongst the developer community.

Build 10B503 (a significant step from the shipping 10A403) weighs in at a meagre 71.5MB and features just a handful of changes, affecting connectivity issues with 3G modems, difficulty removing items from the Dock and unresponsive copies of Motion 4.

Seed notes after the break.

The 10.6.1 Update is recommended for all users running Mac OS X Snow Leopard and includes general operating system fixes that enhance the stability, compatibility, and security of your Mac, including fixes for:

  • compatibility with some Sierra Wireless 3G modems
  • an issue that might cause DVD playback to stop unexpectedly
  • some printer compatibility drivers not appearing properly in the add printer browser
  • an issue that might make it difficult to remove an item from the Dock
  • instances where automatic account setup in Mail might not work
  • an issue where pressing cmd-opt-t in Mail brings up the special characters menu instead of moving a message
  • Motion 4 becoming unresponsive

More unofficial notes from Mac Rumors forums.

- Network Diagnostics now offers to remove manually-entered DNS values for DHCP configurations
- Software Update for printer drivers of Bonjour/USB printers
- HICocoaView double-redraw during live resize
- Bluetooth connection to nearby printers on startup
- libdispatch object use after deallocation
- Sending of messages with Mail where the SMTP server response has no text
- Upgraded email accounts and SMTP servers that require authentication on port 587 but not port 25
- Printer custom keywords added/edited by auto setup tool are now migrated after software update
- Generic drivers are now visible in printer driver list
- WWAN devices that use the AppleWWANSupport2 component
- Updated to Flash 10.0.32.18