There seems to be a lot of comment spam at the moment where the content is just a pair of <a>Â </a> tags with no other content.
The common point linking most of them is their email address being usually an @mail.com, and a handful with @berlin.com. Or more specifically, the following:
There’s been about 76 of these that I’ve found, and they’ve started appearing on Saturday March 15th. To say the least, they are quiteÂ unusual comparedÂ to the regular spam I’ve been getting. I’m sure with time they may vary those addresses, or something else is going to be launched with this being just a simple system test-run.
Doing a little quick investigation via Google indicates that these aren’t new email spam addresses.