When I start a JBoss instance under a path with a space, I get the following error:

org.jboss.deployment.DeploymentException: Error parsing the XML file, from XMLMetaData: ; - nested throwable: (org.jboss.mx.util.JBossNotCompliantMBeanException: Error parsing the XML file, from XMLMetaData: )
at org.jboss.system.ServiceConfigurator.install(ServiceConfigurator.java:178)
at org.jboss.system.ServiceController.install(ServiceController.java:215)
...
Caused by: org.jboss.mx.util.JBossNotCompliantMBeanException: Error parsing the XML file, from XMLMetaData:
at org.jboss.mx.metadata.XMLMetaData.build(XMLMetaData.java:277)
at org.jboss.mx.modelmbean.XMBean.<init>(XMBean.java:238)
at org.jboss.mx.modelmbean.XMBean.<init>(XMBean.java:267)
...
Caused by: org.dom4j.DocumentException: C:\Program%20Files\jboss-4.0.3\tomcat\server\default\deploy\jbossweb-tomcat55.sar\META-INF\webserver-xmbean.xml Nested exception: C:\Program%20Files\jboss-4.0.3\tomcat\server\default\deploy\jbossweb-tomcat55.sar\META-INF\webserver-xmbean.xml
at org.dom4j.io.SAXReader.read(SAXReader.java:484)
at org.dom4j.io.SAXReader.read(SAXReader.java:291)
at org.jboss.mx.metadata.XMLMetaData.build(XMLMetaData.java:240)

Steps to repro:
1. copy jboss-4.0.3 to C:\Program Files\jboss-4.0.3
2. attempt to start the all configuration

This is also reproducible on Windows.