Perhaps my worst nightmare. I got my dress in Feb for my Aug wedding. Took it to my seamstress last week to start alterations, and part of the fabric turned yellow! A professional cleaner said nothing can be done (she tried to spot clean it but didn't work). The bridal shop is going to call the manufacturer and see if there is something to do, but does anyone have any suggestions? The fabric is 100% polyester, like tulle/organza.