Hi im using unity3d 4.3 and vuforia 2.6.7
what i got is this http://img842.imageshack.us/img842/7329/bp6p.jpg
i've tried in many devices and all is showing the same bug... the camera showing just about 1/4 screen size... in any android devices with many different resolution
The Vuforia SDK 2.8 release is now available - https://developer.vuforia.com/resources/sdk/unity
This version is compatible with Unity 4.3.
Be sure to consult the migration guide when upgrading your project - https://developer.vuforia.com/resources/dev-guide/transitionmigration-guide