The PlayBook isn't even two months old yet and it's already scored a second update to its QNX-based OS. First up from BlackBerry Tablet OS v1.0.5 is an upgraded Facebook app, which is now a preloaded part of the system software and can do some really neat things... like delete unwanted messages. Devs will be happy to hear that they can include in-app payments, while our European friends should be excited about the expanded language support. There are a few other welcome changes, including some enterprise-friendly tweaks to video chat, a new pop-up power menu (pictured above), and the ability to charge even when the device is turned off -- a constraint we're sure had at least a few owners pulling a Picard-like facepalm. The update is available now and, while you wait for it download, check out the source link for more details.