Catagory error.

I use a program which automatically posts to a give wordpress blog. Since installing a FRESH clean version of 1.5.1.3. All posts from this program appear in “Catagory uncatagorized” this catagory doesn’t exist as it was renamed to something else. No posts show up in the renamed catagory at all unless done with the marklet, or from the admin panel.

Any clues? I don’t have this problem with 1.5