Sad piece of software from a deeply sad company. I wouldn't consider it an alpha release, but apparently adobe only cares about your money, so instead of trying to bring this to a beta stage (with some bug fixes), they repack it in the CS5 version and try to sell it to you again, same old garbage.
It crashes continuously on my Snow Leopard so I had to look around for alternatives and I've recently found a little gem called DrawIt from Bohemian Coding, it costs close to nothing and it is growing to become a valid alternative to fireworks.
I really hope Adobe continues to go forward with their (flash only focused) business strategy of a second (or even) third class software company (or should I say marketing) to see them out of business soon.
Ps. I still remember when macromedia was innovating web design.