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Well, it's either broken or fixed, depending on your point of view. I was convinced by requests in the bug tracker that the "right" thing to do was not parse HTML inside nowiki blocks. If you want to hide something on your user page, put it in HTML comments: <!-- like this --> (and comments can't span lines, BTW).

I'm not sure whether the spambots will find them if they are commented out. I just turned them into two single-nbsp links; I'm not sure how to make them more invisible.

Text within <!-- --> comments is totally removed before rendering, and will not appear in the served page as a comment.