Horrible Exception: java.lang.NullPointerException

[Akshay Kapur]

My app has been running fine so far on Turbine2.1 and velocity-1.2-dev.jar

I performed the migration from Turbine 2.1 to Turbine 2.2. Still works well.

On replacing the velocity-1.2-dev.jar to velocity-1.3.1.jar or by even the 
velocity-dep-1.3.1.jar, I get the following exception on the browser -
Horrible Exception: java.lang.NullPointerException