UPDATE: RIM has confirmed on their blogs that this update is for Adobe AIR 2.7 and Flash 10.3. Here is how they describe it:
This latest version of the BlackBerry Tablet OS includes support for Adobe® Flash® 10.3 and support for Adobe® AIR® 2.7 software. This means that with this update you should experience even better performance for Flash videos than before, and be able to access new applications that are being built with Adobe AIR 2.7 software.
Well it looks like we got our OS update for the week!. The BlackBerry PlayBook OS has just been updated to v126.96.36.1990. We have received multiple tips of the update and I have confirmed it myself. According to the notes this is the OS that RIM leaked to devs earlier to test our Adobe AIR 2.7 and Flash 10.3.
So what are you waiting for? Hit that Check for Updates button and let us know if you spot anything else new!