We’ve just released a new version of Flash Player: 10.1.82.76, which includes support for H.264 video GPU decoding. This was previously available in a beta release code-named Gala. On top of this new cool feature, there were a number of bug fixes, so you definitely you should install it as soon as possible.
I almost forgot to tell you about the new version of Adobe AIR (2.0.3). Like in the case of Flash Player, besides a number of bug fixes, we added support for GZIP compression for Windows (this was already available for Mac OS X and Linux).
You can get the runtime from here.