Mainly for two sites that, as near as I could tell, don’t actually exist at the moment. Or they’re so new the DNS servers haven’t propagated their info yet. I think I’m done with trackback. I’m going to go through and turn it off on all posts and set the default setting to not allow trackbacks from here on out. It’s just not worth the hassle anymore.
Update: I’m leaving trackbacks on for SEB for the moment for testing purposes. I’ll be turning it off for all the other blogs I maintain though.