Yes. Browsers from different manufacturers are not identical, and there are small differences in rendering. If you code too tightly then you will run into all kinds of small dimensional differences that can break a page. So just allow a few pixels slack and you will not have a problem.
If your website in question is too dependent on it's current code, you could always make browser specific code. That way you could manually make IE9's text smaller fairly easily.
If your website in question is too dependent on it's current code, you could always make browser specific code. That way you could manually make IE9's text smaller fairly easily.
I much prefer COBOLDinosaur's advice, to allow a little slack.
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