today i downloaded latest jenkins war 1.463 and put into webapps folder of my tomcat. i could not start my tomcat. the error is that Bad Version number for com.google.common.collect.IMutableSet(the pagage name is correct, the class name may be wrong. i can't remember exactly now).
i have removed it and downloaded 1.462 of jenkins war. it had the same error.
at last i had to download 1.461. this version of war works well.