As I see there's a problem in showing the group forums, it's cut from the left side + the "Create New Topic" form is always shown while it should appear only when clicking on "New Topic" button.
Are you sure it's not a problem with styles on your installation?
I tried it on a clean installation too, the same issue.
@espoir, i can't replicate too, please drop by our support channels to check what's the exact problem on your installation/site.
If we can reproduce, the ticket here will be opened again (or just new one created) and we can fix it in the theme.
Thanks for reporting!