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If you’re at Camp Randall Stadium this football season, take a close look at the south end zone near the UW Field House. Focus on the bold, white letters spelling “WISCONSIN” on a cardinal red background. Do you notice anything off about them?

One of the letters is flipped.

It’s not obvious; there’s no upside-down W making the end zone say “MISCONSIN.”

If you’ve got an eye for detail and a knowledge of typography, like UW-Madison alumnus Mark Crosby, who spotted the error during Saturday’s Badgers football home opener and told the Wisconsin State Journal about it, you’ll notice the two Ns in “WISCONSIN” don’t match.

Look for the serifs — the little lines at the edges of the letters — and notice how, on the first N, there are serifs flaring out from both the top and the bottom of the left side of the letter.

Then look at the second N. The left side has only one serif, at the base of the letter, and no serif at the top. It’s the reverse on the right side of the letter — there’s one serif on the first N, and two on the second.