Bug: My 0.9 machines disappeared after updating to 1.0

  • They vanished, but there shadows still exist in my save world, so if an animal walks through them they disappear. I can craft them again from the materials I ahd saved, but even the expensive machines it took a while to build are all gone with just shadows remaining. I had to use version 2 of MC Forge for 1.0, but was using version 1 for 0.9. Is there an easy way to fix this, or should I just cut my losses and start fresh with thematerials I saved up from before?