Yes I got a few of those as well during Ethans attempt to update the software, not scam just bad url fallout from the failed upgrade, nothing to worry about, pretty normal as far as I can tell...
Yes, this is part of the update Ethan tried to make, tagging names in post, and giving you notifications of it (My best guess at least, I got a few of those too)
What Gustav said.
Sorry about that. disurl.com is my test domain for this server. Please don't report/block it as spam as Google will then blacklist the server that GroupDIY runs on which has far reaching implications for email delivery. Thanks.