RIM has released an update for the PlayBook OS and is now at version 126.96.36.1994.
It is an incremental update and 37mb in size, and has not new features.
To update your device, swipe down from the top bezel and go to software updates.
After updating you will need to do a restart of your device.
I found out that the update brings support for Flash 10.3 and Adobe Air to support developers, so nothing special in this update.
If you find more please place a comment, thanks.