Also, I think it's important that JBoss work with IBM JRE. On linux, IBM JRE is about twice as fast and much more stable than SUN's JRE.
After perusing the source code, I found the problem. There is some incompatibility with the call to PropertyEditorManager.setEditorSearchPath(newPath) in the file org.jboss.util.propertyeditor.PropertyEditors .
There is an old version of this class which makes calls to PropertyEditorManager.registerEditor(). When I replace the new version in the jboss-common.jar file with this old version, it works with IBM JRE.
Probably IBM JRE has a bug in the PropertyEditorManager.setEditorSearchPath() call. I would recommend that you try to make your codebase compatible with IBM JRE, because it is substantially faster on linux.
sourceforge trackers are the correct place to post this type of information