Using Google Chrome (22.214.171.124) and IE 7 (7.0.5730.11IC)
If I click on the vote number (not up, not down)
It turns into this
and then this
In IE, the 5 and 0 are seperated by more space.
Edit: ok ignore the "2" in the second picture, I just took a screenshot of the wrong vote. It does indeed stay as a "5".