Invite to group, link re0direct is not working correctly.

IN an open or closed group, invite someone t the group. As that user, while being logged out, click on the invite link (Like this one http://beta.curriki.org/xwiki/bin/view/Group_TheBestGroupEver/JoinGroup?code=nvmfnmed&user=jmarks%40curriki.org)

You will be redirected, but the page has the XWiki log-in box and it says "Wrong password". If you then log in with the box in the body of the page, you are taken to My Curriki. If you use the header, you are correctly taken to the accept invite form.

The same thing happens in Production BUT the "Wrong password is not displayed on the initial re-direct to log-in.