I have a drop down navigation that works perfectly when positioned via a left CSS property.
http://jsfiddle.net/durilai/nmME4/1/
You can see that the dropdown adjusts to the width of the content, however I would like to position right. When I do the width of the drop down will not adjust to the content. You can see this behavior at the fiddle below.
http://jsfiddle.net/durilai/cTSJt/2/
Any help is appreciated, also any knowledge into what is causing this behavior is also appreciated.
Ok so basically, from what I can see, the issue was being caused by using the element (in this case ul) directly as the selector.
I believe this was interfering with the below ul elements within your CSS. Simply changing the first CSS rule from ul to your ID (Navigation_Main) fixes the issue.
Fixed example > http://jsfiddle.net/cTSJt/10/
Thanks