Can't schedule or post saved listings

I can't post or schedule my saved listings. I keep getting this message:
Error
The following 1 listing(s) were unable to post because they did not pass validation and need to be edited before posting:

* Auction Title "

I haven't changed anything in my saved profiles, and the error message is vague so I don't have a clue where to look in the listings for the problem.

Can anyone help?

Thanks!