I can confirm this. I have the "Always sign in as Busy" option enabled so I don't usually get toasts, but yesterday I went online a couple of minutes and I saw it.
Well although the problem is with MSN toasts, it is because of Plus!, as the extra characters added by Plus! to add the colours to my nickname mean that the emo would be on the second line, which is enlarged to allow room for the emo, but then because Plus! strips out the colour codes, the emo actually shows on the first line, therefore causing the bug.
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