Hudson 1.313, Windows 2008 Server, Apache TomCat 6.0
Hudson does not Undeply correct.
To deploy a newer version, I first undeply the older version.
The following files never get removed:

commons-jelly-1.1-hudson-20090227.jar
groovy-all-1.6.0.jar
hudson-core-1.312.jar
stapler-1.106.jar
stapler-jelly-1.106.jar
winp.dll

I always have to stop the "Apache Tomcat" to remove the files. If the files are
not removed, the deployment of the newer version fails.