Ok, I was looking around and it turns out that /dev/.bootchart still exists on my system. It has some programs there (like busybox!), some log files, and the proc filesystem, for some reason.
-- Purging bootchart leaves stuff behind https://launchpad.net/bugs/89258 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs