Brion,
Thanks for discovering the link cache bug. It's not everyone who has the humility to admit the existence of a mistake, but you have consistently shown the willingness to speak frankly to the Wikipedia community about the true state of the software which fuels the world's largest wikiwiki.
I have no doubt that you and the other developers will be able to straighten out this snag. Just call it a worm and sic that "brilliant" early bird, Tim Starling on it!
Ed Poor