Why is text rendered with a greater font-size in Opera?

Question

I\'m working on an HTML page that needs to be more or less pixel-perfect, and I noticed that in Opera 10, fonts are rendering larger than they do in other browsers, even tho

Answer 1

My suspicion is that Opera uses a different fallback font for Sans-serif than the other browsers do. That should be possible to confirm or eliminate by using a different font that is definitely installed on the system.