Although work on OS X 10.7 has been put largely on hold in deference to iPhone OS 4.x, incremental Snow Leopard development chugs right along.

iPhone in Canada, increasingly the go to source for Mac OS X development news, reports that Apple’s seeded OS X 10.6.4 [10F46] about a week after the last build release. This latest Snow Leopard increment is said to be focussed on Graphics Drivers, SMB, VPN, USB, and VoiceOver, as well as:

• Resolves issues with copying, renaming, or deleting files on an SMB mounted volume
• Resolves pairing issues with Apple remotes
• Resolves issues with Adobe Photoshop and Illustrator CS3
• Resolves issues playing in Good Quality mode of DVD Player
• Addresses compatibility issues with OpenGL-based applications
• Resolves 3D animation, drop frame, or frame lock issues
• Addresses drawing issues when editing iPhoto in full screen mode
• Resolves erratic trackpad or keyboard issues with USB
• Addressees a Parental Controls issue where users are locked out at designated times by the admin user
• Improvements to the reliability of speech and braille in the VoiceOver Utility

There is a known issue with the HelveticaNeue.dfont.

That said, Apple’s taking eight to 10 weeks to release incremental OS X updates, which position this dot-fix for delivery in the June/WWDC timeframe when the company’s expected roll iPhone OS 4 and new phones.