Please moderate: “”

Over the last month or so I’ve been getting emails from my blog aking me to moderate a comment. There is no comment though. The email looks like this:
——-

A new comment on the post # “” is waiting for your approval
http://skyecade.net/?p=

Author : (IP: , )
E-mail :
URL :
Whois : http://ws.arin.net/cgi-bin/whois.pl?queryinput=
Comment:

——-

I get at least one of these a day. I have Akismet installed and it seems to be working properly. I just have no idea what these phantom emails are all about. I recently upgraded to 2.1.2, but there was no change.

Thanks