I'm impressed what difference it makes to have a non-beta version now available. Yesterday more than 1000 people came to this site. Obviously there was a tool missing on the Mac ;)
The PNG decoding tutorial is updated now - with the newer versions some steps aren't needed anymore.
Additionally the dynamic Grammar Page replaced the old, static one. The next step will be there to add sample files of the formats so you can see the grammars easily at work.
P.S.: Thanks to Uncle MiF for the extensive testing!