I am getting 2-3 new subscribers daily, all from .pl email addresses. The user names appear to be computer-generated strings of letters and numbers. Unless my blog has become very popular in Poland (.pl), there has to be another explanation. I'm worried that there is a hack that can only be used by registered users. They only have subscriber status, not author or admin, but you should see the list of users on my site all from .pl email addresses. Does anyone know what is up with that?