When running the samples with jdk-1.5 you might see the following

tdiesler@satellite /cygdrive/d/jbossws-samples-4.0.3
$ ant tests

compile:
[javac] Compiling 39 source files to D:\jbossws-samples-4.0.3\output\classes

[javac] error: error reading D:\projects\...\jboss-4.0.3\client\auth.conf; error in opening zip file
[javac] 1 error

This is probably related to

http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6295519