I just moved from wordpress.com to my own instance of wordpress, and I have an issue with pingbacks and/or Trackbacks (actually I've tried only pingbacks up to now as far as I see it). They just don't appear. I tried to and from from my old wordpress.com blog. But I can neither get a pingback on my self hosted blog, nor on the wordpress.com blog. I looked trough some random logfiles on the server, but honestly, I have no idea where to start searching and for what.
As far as I understood it, pingbacks are a core part of wordpress and I do not need an extra plugin, is that right? If I do need a plugin, please do tell me which one.
The self hosted blog I am speaking about is reachable here:
Thanks for any help.