For around 3-4 months now I’ve had a REALLY annoying problem with the wordpress install on this site. Trackbacks suddenly stopped working. Somewhere around my 800th post or so while the WMF vulnerability was circulating (between Christmas and New Years) and I was typing furiously – poof…. suddenly trackbacks stopped going out. (Incoming trackbacks seemed to work just fine…) What’s had me stumped for so long is that I host 2 (now three) other sites off the same domain and I haven’t had a problem with ANY of those sending pingbacks or trackbacks.