I wrote a PM tonight and it did whatever scanning process parses PMs now and apparently substituted some text with a link to the dynadot website.
I don't have dynadot on my cut and paste buffer so I'm pretty certain I didn't cut and paste it in error. In fact it's impossible because the link incorporated some of the text of my post and an accidental paste wouldn't have done that.
Am I right in thinking dynadot do the parsing of PM's and it went wrong?