Steps to reproduce

1. Go to http://confluence.atlassian.com/dashboard.action
2. Go to Feed Builder
3. Whether you are logged in or accessing as anonymous, the following menu is no more available:
   1. In Confluence 3.1 or lower, if you are logged in, the following option appears:
      
   2. If you select 'Anonymous' or you are accessing as anonymous, you should get an anonymous feed generated:
      

Finding

This was working fine in Confluence 3.1 or lower

Workaround

• Remove &os_authType=basic from the generated feed URL
  or
• Modify configurerssfeed.vm which is located at <confluence-install>/confluence/dashboard by appending the following code:

      #if ($action.hasAnonymousAccess() && !$action.isAnonymousUser())
      <div style="margin: 0px 0px 10px 0px;">
          <div class="substeptitle" style="background: #f0f0f0;">
              $action.getText("label.access")
          </div>
  
          <div class="searchItem">
              #tag( "Radio" "name='publicFeed'" "value=selectedPublicFeed" "list=accessTypes" "listKey=value" "listValue=key" "theme='notable'" "template='radiolist.vm'")
          </div>
      </div>
      #else
      #if ($action.isAnonymousUser())
      <input type="hidden" name="publicFeed" value="true">
      #else
      <input type="hidden" name="publicFeed" value="false">
      #end
      #end
  

  just before #bodytag( "Submit" "theme='aui'")