There's a well-informed technical piece at http://www.aero-news.net (about the third story down).

Edited to add: The gist of the story is that an Airworthiness Directive was recently issued against the A319/20/21 motivated by concern that it suffers from elevator flutter that could render an aircraft uncontrollable. The aero-news article speculates that the A300, which apparently has an essentially identical mechanical design for the tail section, suffered flutter that broke off the tail. The AD requires A320-type operators to adjust the trim so that the elevator is aerodynamically loaded. (But wouldn't the elevators naturally be loaded on climb out?)

If you have a subscription to Aviation Week, you can find the original article on the A320 AD by going to http://www.awstonline.com and searching on "elevator flutter".

[This message has been edited by someotherguy (edited 11-16-2001).]