Why is the second 0 in a number biger than the others for me?

[natatos]

I was typing 200 in the Google search on the title bar for safari and the second 0 was bigger than the first so I put in some more 0's and they were smaller than the second 0 I've tryed it again and its still happens so I took a screenshot and there are more pixels in the second one.

take the photo and drag it to your desktop then press space and it will be bigger if its on then make it fullscreen.

 

[angelwatt]

I see a slightly taller zero, but more accurately I see a bunch of smaller zeroes. The big zero is the same size as the two. In either case I can't reproduce it with my Safari or Firefox.