Hi Sue,
I've reported your problem.
I haven't had the 'error' message today. You should just be able to click on 'New Thread' to get the empty box!
Hope we get it sorted out quickly for you.
Fi
UPDATE FROM THE BSS WEB TEAM:
We didn’t have any problems starting a new thread… can you ask the user to log out and log back in before trying to re-post.
Maybe if there is more detail that the user can provide?