getAlternativeJarFile is broken for vfs urls. It all comes down to no ability to navigate a URL and no ClassLoader.getResources with a regex pattern, so they have to try to guess what type of URL it is. There needs to be a better servlet api to access resources inside of a war for code like this to work in general. Is there any point that the tag lib urls can be overriden? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4127184#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...