Here's the added stuff since the 2007-01-01 SVN Rev7469 Build:
* added: notification of reservation for the video library stuff.
* added: localized ascending and descending strings.
* added: [ 1624734 ] Allow Dim screensaver to go to 0%
* added: Scaling of fontwidth in 16x9 views (to maintain aspect ratio), and added tag to override this. All 2.1 skins will be scaled by default.
* added: tag for togglebuttons when in alternate state.
* added: .pls as a normal extension for video's too
Full Changelog here: