I too have had this problem. It started when I posted a hyperlink in one of the portal boxes. The poster was unregistered and posted some spam. The link I provided was straight into a topic thread with ongoing content. Near as I can tell the spammer (or hacker) was able to write directly into one of the SQL tables. This happened twice and I removed the link. It hasn't happened after that. Over the years I've been using Rick's product this is the first time I've ever seen this happen.