Wipe data / factory reset Wipe dalvik cache (Inside advanced tab) Install zip from internal SDCard (galaxytabreview.com)
Did he wipe data / cache, wipe dalvik cache, and fix permissions? (gigaom.com)
The rumor is that RIM is considering to use Dalvik virtual machine for their QNX OS on the PlayBook and mobiles, which is the same as what Android currently uses. (pocketberry.com)