I very doubt it's anything to do with the cache, and that isn't an uneducated guess. But I've very doubted things before, and they turned out to be the case any

I very doubt it's anything to do with the cache, and that isn't an uneducated guess. But I've very doubted things before, and they turned out to be the case anyway, so why would you listen to me? My assumption was/is that it refreshes stuff on a timer. On each timeout it puts a refresh event on some kind of queue... and then somehow manages to fuck it up, and ends up having a bunch of these events to deal with all at once, rather than handling each one as it comes in with a sensible gap between each one. Well, sometimes it happens, and don't ask me how I know. But I have to say that you usually don't release it like that :(