I have a set of nested DIVs that slidetoggle using jQuery as the user clicks on them. Inside the innermost DIV there is an anchor tag with an HREF that should navigate somewhere
I just came across this issue today. I found a very interesting article that might help. It describes the mis(use) of 'return false' and Jquery events (http://fuelyourcoding.com/jquery-events-stop-misusing-return-false/). I haven't tested the following code on your example, but I think this should work.
$('.subSystemHeader a').click(function(e){
e.stopPropagation();
});