Thanks to all who brought us this new release. 
A few preliminary findings when compiling one of my biggest sketches:
I got the dreaded "byte does not name . . ." when I compiled with 0013.
So I included "WProgram.h" in the main tab and it compiled fine.
(I also found I couldn't include "WProgram.h" and compile with 0011.
The big news for me was, contrary to everything I know about the software word, my sketch was smaller under the new version! 
(It went from 13934 to 13394 - 540 bytes less! Yahoo!)
Thanks again for the new release. Now I don't have to feel guilty about skipping 0012.