I've appended the contents of the "What's New" box from the update dialog box (did you know you can copy and paste that text? I didn't until I tried it!) into the remainder of this article if you'd like to get a quick look at what's new before you install. This is by no means a complete list, but it's a start.
The 10.1.2 update delivers improvements and new functionality, as well as expanded peripheral support for Mac OS X. Enhancements include:
- Updated and new USB and FireWire device support, including FireWire-based digital cameras
- PC Card storage devices, including media readers
- IrDA modem support for FireWire-based PowerBook models
- Audio, Display, and Speech improvements
- Networking and Printing improvements
- AirPort v2.0
- Apache web server v1.3.22
- AppleScript v1.8

