As you may know, there was a class named Xith3DDemoFolder, that I created for easier and common usage of demo resources in the Xith tests. It was never meant to be used outside the xith-tests. Some people did anyway. It doesn't exist anymore. So if you used it and don't wnat to port to the replacement, place save your personal copy before you next checkout from SVN. But I advise you to port, since the new class is much better and designed with extension in mind to better fit your project's needs.
The replacement is org.xith3d.utility.resources.ResourceBag. This time it is meant to be used everywhere. Once initialized it is irrelevant, if your resources come directly from the filesystem of from a jar. Resources are always handled as a URL. It can also be used like a singleton.
It also eases the use of TextureStreamLocators. Just explore its JavaDoc to see its capabilities.
It is used all over xith's test classes now and as a result they are all runnable from jar (all but BSPLoader and Cal3DLoader).
I have relpaced the test-class'es JavaDoc (topmost block) by an Annotation. This looks a little odd, but is still well readable and I can use it to display exaclty this text in the Xith3DTestLauncher. Just run it and see the benefit.
Enjoy

Marvin