A lot of my posts tend to refer to my older posts. Traditionally I'd link them and WP would generate a pingback on the old post with a link to the new post. I liked that behavior as it helped add some continuity to some of my topics.
I just noticed that no longer happens for me. Looks like my last self-ping was from back in January... Wasn't there a new release early Jan? I wonder if that's related.
I found a trac ticket that refers to this or a similar issue but has some statements saying that self-pings have been deliberately disabled. Is that really true?
Figure I should check before I begin the rather tedious testing of plugins to make sure one of those isn't borking up the works...