this is usually the cause, but last night it was happening even after the page was fully loaded, and refreshed a few times. was weird.
my hand. it is outstretched towards you.
One thing that can be done to fix this is to hit ctrl+F5 (I think the mac version is cmd+F5). This does a hard refresh of the page, wiping everything about it from the cache and reloading it from scratch.
Your comments in that thread are breathtakingly stupid and ignorant. They were flagged for deletion but I let them stand because I thought they were such an ideal monument to bigoted idiocy that it would be a shame to lose them. If another mod deletes them, you should be thankful.