BuddyPress.org

I would imagine you’d be best to take the plugins out of mu-plugins and put them in a new folder called “temp”, upgrade BP, and then replace the files back into mu-plugins.

The reason why this is necessary (for now) is because plugins that depend on BuddyPress being active do not have a dedicated way to check for its existence, and will die when BP isn’t there.

This will be addressed in future versions.