Hey,
I imported the user defined target sample into my empty unity project. I am using Unity 4.5.
When I start the app in unity it works well, but if I try to push the app to a phone or tablet it crashes.
On my Galexy Nexus the logcat shows me the following message:
E/IMGSRV ( 3463): :0: Index offset 1698172960 is larger than index buffer size
My Lenovo Tablett A5500-h crashes without any message.
I tried to start it in airplane mode and with internet connection. I rebooted the devices and installed the app several times. It still crashes after the splash screen.
Here are the settings I use:
http://hinauf.rm-community.de/inspector.jpg
http://hinauf.rm-community.de/build_settings.jpg
There doesn't appear to be any Vuforia related errors in those logs to troubleshoot. You might want to try using Unity 4.6.x with the Galaxy S3.