quoting Rhetorica:

Twitter feeds update hourly, causing the users page to take longer to load when it's stale. RSS blog feeds shouldn't be cached, (i.e. they should always be fresh) but I forget the details. I'll look it up.

OK – I posted something on my blog yesterday; the feed hasn't yet updated here, though. Not that it's terribly important, but since we're gathering bugs, I just wanted to let you know.