The blank page is a bug with UBB. It has to do with a re-draw being interupted after the last post. It can be "fixed" in the general forums by hitting the link to "Last Post" and posting to it (thus causing a re-draw).
Unfortunately, the squad forums (or any private forum) does not have that option.
You'll have to send Ronnie an e-mail.
BTW.. this is not a user specific bug. Nobody in your squad should be able to view the page when this happens.
AKDejaVu