Here's whatsnew:
Additions:

- Joystick calibrate button in the input dialog.

Changes:

- Now possible to make save states (slots only) during netplay.
- Some error messages more descriptive.
- Log file now enabled by default.
- Lazy loading of some resources, notably the launcher file database.
- Various aesthetic GUI fixes and improvements.
- Refactoring.

Fixes:

- Lightgun trigger no longer registered if screen is occluded by a window.
- Various things, subtle and not-so-subtle.

Core:

Additions:

- Power Glove peripheral support.
- Mapper 38, 108 and 173. Info from Ca4He3.
- UNIF boards: TF1201, KS7038 and GS-2004. Info from Ca4He3.
- Mapper 150 reset-triggered DIP switch toggling.
- Database entries.

Changes:

- Speed optimizations (NO accuracy trade-off).
- blargg's nes_ntsc updated to version 0.2.2.
- HSB/RGB calculation method.
- 8bit video mode rendering removed.
- 2xSaI filters removed. Use hqx or ScaleX instead.
- Even stricter ANSI/ISO compliance.
- More compiler options and detections through the preprocessor. Refer
to "NstApiConfig.hpp" as starting point for porting work.
- Board names. Info from Pongbashi.
- Refactoring.

Fixes:

- Mapper 234.
- Mapper 242. Fixes "Dragon Quest VIII (Ch)".
- Database entries.
- Various things, subtle and not-so-subtle.

Get it here:
http://nestopia.sourceforge.net/

-Trebor