This is mainly a bug fixing release. There've been some problems with ATI Radeon HD cards basically not rendering layouts. This looks like a bug in the graphics driver. I've tried emailing them to see if they say anything, but in the mean time I've implemented a workaround. Hopefully it works for all hardware :-\
Also, most Intel cards before wouldn't launch the picture editor. I really overestimated OpenGL support out there. I can't believe how limited the features of Intel graphics cards are. I seriously would recommend in future everyone get ATI/AMD or nVidia graphics cards when you get your next computer or laptop. They're much faster, more reliable and actually have a reasonable feature set. In the mean time, you can now launch the picture/animation editor on Intel cards, but you can't mirror, flip, crop or resize. At least you can put together animations, though.
The rest - mainly a slew of bug fixes and minor additions.
Edit 21st July 16:53 GMT: fixed a bug in Sprite's 'Set animation' action that was introduced in this build. Clear cache and re-download the setup if you're affected.