This is the solutions to everyone out there that faces this error message. the solutions is copied from here getsatisfaction.com
If you go to http://www.facebook.com/twitter and remove the link to twitter from the affected wall (Click on "Unlink from Twitter"). Then you should be able to get the updates that previously failed, to your fan page again.
i don't take credit for this but its kind of hard to find this as well so here goes!