Re: cant change title with edit
If you made the post, you can change its title as suggested by going advanced in the edit mode. However, if there are other posts in the thread, you can't change their titles, as they don't belong to you. You can then go down and change the title of each of your posts.
The title change feature is intended to be used when you have posted the original and then say "OH S!!!!"
I'm not sure even admin can change every title in a thread on a global click.