Re: Buddypress/buddymatic issue
I had this same error and realized it was a conflict with a plugin that I had installed – the BuddyPress Template Pack. I’d been trying to use the Thematic theme, and had the plugin installed for that (however, could not get the BuddyPress menu to show up in this theme). When I switched over to BuddyMatic, it all went white until I deleted that Template Pack plugin. After that, however, the page has been littered with errors that I have not resolved. But it does resolve the empty page.