message centre mysteries

The plot thickens.

After receiving no messages at my message centre for two weeks, I suddenly received some last night!

Today, I received some new ones. The new ones as well as all the old ones now say this:

unable to get cluster reader: 0 at /home/lj/cgi-bin/talklib.pl line 1877.
unable to get cluster reader: 0 at /home/lj/cgi-bin/talklib.pl line 1877.

Am I being stalked by a Torchwoodesque evil alien??