Trackback not working

I was having a similar problem (along with an error message when posting in Safari). In my case, it turned out that there was a server problem that was causing the server not to send back the proper response when posting. When this occurred, pings and trackbacks did not go out. (Perhaps someone here who knows how the pinging/tbing process works can explain why this occurs.)
However, I don’t know yet what caused the server problem, though we are still troubleshooting it and might have an answer soon, and I can’t say whether your problem stems from the same source. It probably wouldn’t hurt to keep an eye on this forum, because if I find the answer to my similar situation, I will post it in the above-linked thread.
In the meantime, bookmark this link, because it allows you to send out trackback pings manually.

https://www.ads-software.com/support/3/16240

That’s the opposite problem. In that post, he says that his blog doesn’t receive trackbacks. This poster says he doesn’t send trackbacks. (Which is the problem mine was having along with the Safari errors.)

Sorry about that, but I’m not the only one who’s able to search here. Yes, you too can search. It’s that little box in the upper-right. https://www.ads-software.com/support/3/8823

No need to be snarky. (And when I post questions here I do search.) You did send him to the wrong thread. It is an easy mistake to make and one I certainly would be likely to make myself.
Incidentally, I just checked and my copy of functions.php does NOT have that fix, and yet I sent out a trackback just last night, and it worked. Why would that be? Is it one of those things where it will work sometimes, but not consistently unless I make the fix?

Check out this post. It worked for me!
https://www.ads-software.com/support/3/16240

My WordPress 1.2.1 installation is not sending pingbacks nor trackbacking. 1.2 did the trick just fine. I don’t want to downgrade. What should I do?

What have you done to test it?