So, I looked through all of the patches and the kernel and the java classes and these are the significant changes (well, more significant than most of the changes which are just timestamps):
- Now font support: Code2000 (not sure where it's used)
- X-Ray updated to 1.1, I think it a pathway for support for more languages
- TTS has a new event, TTS stopped (no use for the user)
- A java debugging binary is removed from the system
- Jailbreak is fixed. They've stopped using innerHTML in their javascript
- MOBI image handling is sped up a bit
- TTS volume is a slider instead of buttons
There really isn't much.