I'm having a lot of problems with using the trackback feature to connect to others' sites, and it's meaning that I'm accidentally spamming them(!)
Moveable Type is smart enough to parse through my post and see if there are any URLs it can ping. It then does so. All well and good.
The problem is that I sometimes get an error message that the ping has not gone through. Which means that it tries again the next time I edit the post. This feature might be nice, if it weren't for the fact that the ping actually HAD gone through. MT is smart enough to know that if a ping went through it won't retry it on subsequent post rebuilds (what happens after you make an edit) but it does not readily seem possible to keep it from repinging the sites that were already successfully pinged, just without my MT installation knowing that.
This bug can pretty much kill any benefit to the feature.
It's becoming clear, regardless, that I'm going to need to upgrade my MT installation one way or another, and soon. But when.....???
Edit 1/26: On the other hand, the major polluting problem I'm having pertains to this post and my link to the other blog discussing the textbooks. The thing is, the breakdown really isn't on my end: his site keeps sending mine 500 error messages, when in truth it's been happily accepting all of the pings. So it isn't entirely the fault of my MT installation that it thinks the ping hasn't worked. However, I think it would be good if there were a way for me to override the renewed ping, so that every time I make an edit to the post I don't accidentally submit another trackback. Since *I* know that the ping went through, I should be able to easily inform MT of the fact and keep it from trying again. I'm presuming more recent versions of MT include this functionality, although I don't know for sure.