To recreate:
Go to: http://www.jboss.org/jdf/quickstarts/get-involved/
Expand: Don't forget to read the Contributing Guide
Under "General Guidelines", the first bullet says: The sample project should be formatted using the JBoss AS profiles found at http://github.com/jboss/ide-config/tree/master/
Click on the link and it closes the expanded section and stays on the same page.

I can get it to work by using the right mouse and select "Open Link in New Page" or "Open Link in New Window".