Incorrect reputation check when attempting to reopen a closed question?

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So just now I came across this question, which appears to be a duplicate of this question.

I saw that I had the ability to close the question, so I did so, marking it as a duplicate.

When I noticed that I was unable to indicate which post the question is a duplicate of, I tried to re-open the question.

However, even though I have well over the required 50 karma, I was unable to reopen the question:

Either I'm not reading the error message correctly (the > 50 karma requirement only applies to the post owner), or the karma check for reopening a question is not being done correctly.

Also, shouldn't the error message say "karma" instead of "reputation"?