name for the thread should be Scriptaculous Effects (RF) breaks on fast clicks. :) Actually the issue of one of our third party. And as I know it is known.
It just gives me some itch whenever I think that not everyone is computer literate.
We once had a client user who's got a bad browser habit (true story, really). He always double-clicks everything he needs to click once as if "single click" has never been invented or maybe he just got a shaky hand or he doesn't trust that the browser was already working its ass to get his bloody request done. - -!