Hi all,
I've just bought a dress from All Saints, here:
www.allsaints.com/women/dresses/gregory-dress/black/wdj005-5
In fact, I bought the gray version a few days ago, in a hurry, but got home to find it was a bit loose. So I ordered the black in a size down, online, thinking if it fit better I'd return the gray and get it in a smaller size. The black fit much better (boobs not falling out!) the first time I tried it on. Wore it tonight, and the zip was still to do up but I thought it was just an odd angle. The zip was completely jammed when I came home and took it off so I wiggled it over my head and found the zip was totally stuck. The stitching between the dress and the zip backing had begun to pull away in one place, but it still wouldn't come open.
I'm really pretty sure it's a faulty zip, not that I'm too fat for the dress. But if I return it and say so, do you think they'll take any notice or do you think they'll just tell me it must be that I bought the wrong size and damaged it? 
I don't often return stuff and never to All Saints before, so would like to know if their returns service is any good?