I just noticed why trackbacks have been failing on my site. The plugin I have been using to prevent comment spam, BotCheck have been stopping trackbacks.
In my quest to solve this someone recommended using a plugin called Bad Behaviour instead.
So, I have just deactivated BotCheck and activated Bad Behaviour. Trackbacks should be back working fine, and I will report back later on how this new plugin prevents both comment spam and trackback spam.
eirikso 
[…] Edit: I have had problems with BotCheck preventing trackbacks. I have deactivated it and try another plugin. More on that issue here! […]
It seems everyone has problems with Bot Check. Even Jeff Jarvis. Of course, he chose the wrong plugin to replace it…
Ha! Nobody wants HAL to control their site. I look forward to a long friendship with Bad Behaviour.
[…] A quick update on the situation I have been using BotCheck to fight comment spam on this site. After a while I realized that BotCheck also killed all trackbacks. So, I deactivated BotCheck and installed “Bad Behavior”. […]
[…] Update: I have had problems with BotCheck. I am now running a plugin called Bad Behaviour to stop spam. […]
Spooler_Go_42…
HI! I’am Spooler_Go_42.
Please visit my blog.
Thanks.
[url=http://Spooler_Go_42.blogspot.com][/url]
http://Spooler_Go_42.blogspot.com…