If you are playing in the semi-finals, they are tomorrow. You will need to grab a hold of the new missions print outs, as once again they have been changed. This is nothing new, I remember 3 or 4 changes in last years as well. The date listed for these changes was on September 6th, but I think they were just changed and the date not updated.
Thanks to BDS (from Blog
BDS 40k) for catching this change this morning and bringing it to our attention. He does a good breakdown of the changes on his site. Here is a link so everyone can read the final release of this mission.
Ard Boyz Missions