There is a download link on the Actional home page to the forge...
http://fusesource.com/forge/sites/adg
Clicking on this URL takes you to...
http://forge.fusesource.com/forge/sites/adg/
The link on the Actional home page needs a trailing slash for the proxypassreverse statement in Apache to work correctly. I'll have the Actional site updated to add the trailing slash but this could happen to any project so a fix should be put in place.
The proxy rules on the main website have been simplified to the following: