Minimal is a very good word to describe jTree, which most of the time is good, however sometimes you might just want a little bit more. One of the biggest issues for me was lack of clickable links inside the LIs. Fortunately after some tweaking I came up with a hacky but working solution:

if ($("#jTreeHelper").is(":not(:animated)") && e.button !=2) {
 	//	Allow for clickable links
	if(new String(e.target).match(/(f|ht)tp(s{0,1}):///ig)){
 		return false;
	}
	$("body").css("cursor","move");

Just add the highlighted lines in the jquery.jtree.js file. Basically it just checks if the target of the click is a link and if it is it ignores the dragging.