groups/create slug fails without WP_DEBUG

Hi

I'm working on a new BuddyPress site based on the EduBlogs theme.

However, the /groups/create slug was not going anywhere.

So I switched WP_DEBUG on and - lo - it now works.

I've double-checked and without WP_DEBUG, it doesn't work, with it does.

Why would that be?

Regards

John

The output can be viewed here:

http://studyit.dynamicarray.co.uk/groups/create