UPDATE: RIM has mentioned on their blog that this update addresses a vulnerability in Adobe Flash 10.2 which is on the BlackBerry PlayBook. This vulnerability was just announced by Adobe for all systems earlier this week and its already patched.
Well it looks like the techs at RIM have been working this weekend. Quite a few readers and team members are reporting that v188.8.131.522 is now available. You simply have to fire up your PlayBook and hit check for updates.
I am not sure what this update is since RIM just released an update to 184.108.40.2064 back on June 7th. That also breaks their previous statement of OS updates as often as two weeks. Now we have OS updates as often as every 4 days. Could be it is simply an Adobe Flash Player security update like they included in the description.
According to the update this version:
This version offers improvements to the software update process and video chat, adds new languages, provides a security update for Adobe Flash Player, Preloads Facebook and more.