(#100) The status you are trying to publish is a duplicate of, or too similar to, one that we recently posted to Twitter

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
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!