This same issue came up in January and was marked as status-completed in February, but I noticed today that it's back again (in some browsers):
It's not as bad as it was, but maybe the width needs another adjustment.
This was observed in Chrome 41 and IE 8 at default zoom levels. I cannot reproduce in IE 11, and the problem goes away zooming in or out in Chrome.
EDIT - What André's suggestion would look like:
