For some reason when not logged in the main login box table appears wider than it is when you are when logged in so it makes everything look off unless logged in.
Here is a picture when logged in looking as it should:
http://www.ImageTrunk.com/uploads/fdb10d3018.png
but if you don't login or just visit the forums you get this
http://www.ImageTrunk.com/uploads/ba381c295c.png
I have tried uninstalling and reinstalling both the left sidebar and sidebar navigation mods but still get the same result.