Just had a small software update for .1526
Not sure what made me do a software update on my 2nd PlayBook (it's fairly new, so just left on charge and I've just really installed my apps but not really done much else with it).
It was a 1MB update for .1526 - and I wished I'd had the presence of mind to do a screen capture. It wasn't one of those updates you get when you uninstall / delete an app or shortcut it wants to put back - it specifically mentioned issues regarding gmail and yahoo email setup, and mentioned something about browser improvement(s) too. That did make me wonder about the gmail / caldav issue, recently.
OS version number hasn't changed, and I checked on my main PlayBook and it didn't show any available updates.
Just to be clear, this is a new-ish PlayBook, nothing uninstalled, and a small amount of apps installed, nothing sideloaded.