[jQuery] Custom Events and Propagation

[Michael Bleigh]

I am trying to define a custom event that may or may not fire after a
given mouseup event. I want it to be bindable to any element but now
this is causing problems with jQuery 1.3 custom event propagation. My
current implementation is something like this:

jQuery(function() {
  jQuery("*").mouseup(function() {
    if (conditionsMet)
      jQuery(this).trigger('customevent', [customData]);
  });
});

This works more or less as expected in 1.2.X, but in 1.3 it ends up
triggering multiple times per click because if it triggers on a child,
it is both propagating up to the parent and triggering independently
on the parent (because of the '*' selector).

How can I write this in a way that it can bind to any element but
prevent triggering for all parent elements during a single event with
the exception of propagation?

Thanks for any help,
Michael Bleigh