Brion Vibber wrote:

There seems to be something awry with the UDP multicast system we use for purging updated pages from the squid caches. This can cause pages and images which to not update properly for non-logged-in visitors.

Hopefully we can get this sorted out this evening; it's probably related to recent rearrangements of our network infrastructure in Florida.

Mark fixed this a few hours ago.

-- brion vibber (brion @ pobox.com)