ok something strange is happening now.
I installed a copy of version 1.6 on my testing server and while setting up the catagories the URL key area dissapeared and I cannot get it back.
It was there at first when I selected create a new catagory but after clicking save catagory it dissapeared. Everytime I select to create a new root catagory this happens, the area is there until I click save.
I have just noticed that it stays if I choose create sub catagory instead.
Has anyone got any ideas about this? I think it could be that Ive set my server up wrong which wouldnt surprise me as Im not very good at that kind of stuff.