<p dir="auto">Under firefox 7, the models js library sometimes doesn't clear backdrop properly when rapidly left mouse click on launch model button. I can reproduce it on the bootstrap demo site too.</p>
<p dir="auto">I'm reporting issue first and will look into it tonight.</p>
<p dir="auto">this.$backdrop is sometimes undefined when calling a modal without a backdrop.</p>
<p dir="auto">This throws an error, because the method this.$backdrop.remove() cannot be called.</p>