22.214.171.124 fixes a bug with asymmetrical polygon shapes within static bodies having an incorrect bounding box, causing collisions to sometimes not be registered.
Box2DFlashAS3 1.4.3 has been released, the update contains bug fixes and a few changes to the flash version and examples.
See the readme for more information.
The first release of Box2DFlashAS3 is now available for download.
Grab it from the download section and let me know what you think.