Was able to confirm your issue as a bug and have created the below bug ticket.
forge.joomlapolis.com/issues/3310
I've supplied patches to resolve the issue as well as pre-patched CB 1.8 Stable files. If you'd like to apply the pre-patched files simply copy/paste/replace them in the below location.
administrator/components/com_comprofiler/library/cb/
Testing appreciated.