A note to anyone getting the following message java.lang.VerifyError: class net.sf.cglib.core.DebuggingClassWriter overrides final method visit
The problem is a mismatch in the versions of asm and cglib in your webapp. cglib 2.2 pulls in asm version 3.1 (there should not be a higher version in your classpath)
cglib cglib 2.2 compile