The '3' doesn't look any more different than other chars due to rendering difference, to me.
And KDE's font manager's take on Verdana: http://i.imgur.com/4c5cSe3.png
And Firefox on my system, just as a reference: http://i.imgur.com/a2yZ7UQ.png
There are differences with how the text is rendered. Maybe it has to do with kerning and subpixel optimizations.
The '3' doesn't look any more different than other chars due to rendering difference, to me.
And KDE's font manager's take on Verdana: http://i.imgur.com/4c5cSe3.png
And Firefox on my system, just as a reference: http://i.imgur.com/a2yZ7UQ.png