java.lang.IncompatibleClassChangeError in 4.0.5

[infinity2heaven]

I get this error at runtime for my application deployed on JBoss 4.0.5 which has hibernate 3.

java.lang.IncompatibleClassChangeError
at org.hibernate.impl.SessionImpl.afterTransactionCompletion(SessionImpl.java:377)
at org.hibernate.jdbc.JDBCContext.afterTransactionCompletion(JDBCContext.java:228)
at org.hibernate.jdbc.JDBCContext.disconnect(JDBCContext.java:191)
at org.hibernate.jdbc.JDBCContext.release(JDBCContext.java:88)
at org.hibernate.impl.SessionImpl.close(SessionImpl.java:274)

The same configuration deploys fine on JBoss 4.0.2.

I tried googling and removed log4j jars (incompatible versions probably) from my application.war file but the problem still persisits

what next?

[infinity2heaven]

I got this solved by deleting one of the hibernate.jars that comes along with Jboss 4.0.5 distribution. My application's WEB-INF/lib had an older version of hibernate.jar and that created the incompatibilities at runtime ...