Since the revival of GPLFlash this is what has been done:

0.4.13:
Support for playing swf-animations embedded in .exe-files.
Another try at making the browser-plugin more stable.
+ other bugfixes.

0.4.12:
Added support for mp3-compressed sound and some build-bugfixes.
GPLFlash now requires libmad

0.4.11:
autoconf/automake buildsystem added
Support for compressed swf-files (flash 6 & 7) has been added.
The browser plugin has been made more stable.