I started an art shop thread, and I initially had 'under construction, please don't post' in the title, like I would do anywhere else to prevent people posting before I got the posts I needed for the front page, but now I can't figure out how to change the title and remove that bit to make the permanent shop title...help???

Thread titles can't be edited. =/
(People have put that in the suggestions, to allow thread titles to be changed, but so far nothing have been done yet)

What people usually do is to title the thread with what you want to title it, and post in the thread that others not post until they open the thread for posting.

Ack. Ok. Thanks...Do you know if it's ok to start a new, duplicate thread with the right title and mark the old one as abandoned then?

I think it should be fine.

Just create a new one, and post/edit the old one to say that it's no longer in use.
That's the best that you can do, since we can't delete threads either.

Alright, thanks!

you're welcome. =)