Bugger. I didn't notice the join until Mentos pointed it out. Nice shots but yep.. search for different software (if software joined it was). Actually, can you let us know exactly what you used? I am thinking of some panoramas so some guidance would be handy.
Thanks for the comments guys. I put them together in photoshop. It wasn't easy because I didn't shoot them to put them together, but I'm happy with how it came out. I just finished correcting that one dark one in the middle, maybe I'll upload an updated version later.