BuddyPress.org

Hello, I have just built my first Buddypress site, and its all going well so far. Based on the Fishbook theme – I have added a custom header image and thats basically it so far.
However, I was just editing the footer text to add my company name, and when I save, all the footer text had gone! I also noticed, and this may or may not be related, the little tabs at top left of screen for My account, sign up etc are missing.
Any ideas? What have I broken?
Thanks