Whats app registration issue. Stuck on the 'Initializing' page
Please try to to make sure of the version of the messenger you have is (Version 2.11.169), and then try to download the application manually from whatsapp website (http://www.whatsapp.com/android/) and install it manually, while installing it it will ask for replacement, hit yes and continue installing, this will give you the previlage to avoid losing all previous data and to recover whatsapp's data.