Humour me, but are you on the Flickr team? I'm seeing that page change before my very eyes, clearly as a "oh shit!" response when the discrepancies were noticed, and the cache excuse is as old as time.
It was developer humour rather than an accusation. Many of us have been in the situation where we overlooked changing something, and when it's noticed we quickly change it and attribute the original mistake to some mysterious caching issue.