I noticed something odd with the top bar, but I blew it off as me seeing things (again), but low and behold I wasn't. After deleting, editing, and undeleting an answer I had been upvoted on, the counter seems to go a little nuts.
I had answered a question and gotten a few up votes on it, but I wasn't happy with my answer so I deleted it. At some point I clicked on the reputation change in the new top bar to clear it. I went back to edit my question later and then undeleted it. Of course the votes I had received were still there, and once the system recognized my undelete action, the new rep counter showed this:
I would have imagined that it would show the votes I had earned prior to deleting it (+40), or at best a total for all my points today (nowehere near 431), but that's what it showed.