1. Start Eclipse 3.7.1 JEE bundle.

2. Add this site: http://download.jboss.org/jbosstools/updates/nightly/soa-tooling/trunk/

3. Search for updates

!MESSAGE Error in file:/home/nboldt/eclipse/37clean/eclipse/p2/org.eclipse.equinox.p2.repository/cache/content1375829237.jar at line 11628, column 24: Duplicate singleton element in element "repository": <references size="4">

4. If you then check for the list of available update sites, you'll see that the ones listed in the SOA site's associate site list are not shown.

So, two problems:

a) content.xml contains TWO <references> sections
b) second section of references is not loaded when the site is read