Rotated Tab (Transform:rotate) Positioning

[bagfull]

Here's my current code so far: http://jsfiddle.net/VsGMa/2/As you can see the tab is not positioned correctly. Here is the "horizontal" version which works fine: http://jsfiddle.net/HHg7S/Any ideas as to what may be wrong or how I can align it correctly?transform-origin is now 0% 100% - tried a bunch of other values as well with no luck.