Argh. There's clearly some sort of blip somewhere between my eyeballs and my fingers with this particular name.

I think we'll have to live with it now that sign ups are open - although the risk that someone might be about to press Submit on a sign up using it when I'm fiddling with the tag set is minimal, it isn't zero. I don't think there's any other character the tag could be confused with, so we should be able to muddle through.