Strange IE issue with jQuery mouseleave event

Strange IE issue with jQuery mouseleave event

I am having the strangest issue with a drop down menu in jQuery. If you run the result below in IE you should be able to reproduce the issue. When you click or focus on the text box a drop down menu with some options will appear. If you hover over the radio labels the drop down stays in tact but when you mouse to the right of the labels the menu will disappear. This does not seem to be the case in Chrome or FF. What is even more odd is that if you change <div class="options" to <span class="options" the problem goes away. Please use the link below to view the code I am having issues with.