For some reason when I'm browsing the units the little keep/want/have arrows that used to be underneath them have gone. Actually the vast majority of options which used to hang out on the sidebar just aren't showing up any more. The only thing left is the box for the build list. Can anyone offer some help?

probably a cookie error.
my universal fix for things like that is to check the "remember me" box next time you log in.

Sounds right to me. You can also try just closing the browser and re-logging in. That always works for me.

Thanks for the advice. Hitting the "remember me" tab solved the problem. Again, thanks for taking the time to help me out. .