Why does my jQuery click handler appear to run multiple times for some of its targets?

Question

I apply:

$(\".newContentLink\").click(function() {
    $(\"#test\").append(\"1\");
});

On this:

Answer 1

Not a jQuery bug - Working Demo

There must be a problem with something else in your code. Where is the element with id="test" in your markup?

EDIT:

Just read chaos' answer, which sounds like a plausible explanation.

By the way, element ids must be unique within HTML markup - this is part of the HTML specification and may be another possible explanation