It's actually a double "http://" but the browsers seem to transform that to "http//". It's due to one of the preparations to support https in BAM!. Only the URL of the project was stored in the DB and "http://" was put before it during rendering the pages. Now the DB has the "http://" part as well so I have to remove that from all the pages.
Please do not PM, IM or email me for support (they will go unread/ignored). Use the forum for support.