@mcscx Yes, but one had tags and one didn't, which is a pretty distinct difference. So it could be HTMLPurifier (as hannes suggested) that does something. For example in the one without tags, it had no HTML to modify so it could perhaps be that the string was left entirely untouched.

That of course would mean that all other notices with tags and non-ascii characters should be affected as well.

I'm just rambling here and won't bother looking up any support for my theories tonight :]