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o@ßX shows up as [email protected]ßX
However, when I go to the comment thread, it shows up normally:
Oddly enough, I couldn't reproduce this on the dev server. I commented on the thread named "test thread" on this post, and neither I (signed in) nor other people (not signed in) could see the [email protected] link. The comment looks normal both from the question and after going to the thread's page.