Product Theme: Buddypress Graphical Errors

Certain pages on my site are encountering errors where the content wrapper divs are not expanding (i.e. padding only, no content) and the actual content is spilling over.

This seems to be specific to buddypress pages like the signup page & the members page. Has anyone else experienced this?

If you'd like to have a look the site is privateinvestigations.ca. The username & password you'll need to see the site is:

Demo
guest-demo

Thanks,
Andrew