It's a timing issue of some kind - the full page load failed at some point and recovered in a weird way. All of these dynamic pages have many more moving parts than one might think, creating each part of what the user sees from many different templates. When something burps, it more normally would fail by showing whatever type of network error caused the problem, "lost connection", etc. This failure but not failure is definitely a weird one. Just to be safe, I should probably ban JB's account, right?
