It looks like a manufacturers defect and should be replaced. However, I'd probably use it anyway since I rather like misdyed things. Especially if it's going into a Civil War or any other reproduction type quilt. Back then people used whatever they had even if it wasn't perfect. Whether you take it back or not, you should let the shop owner know.
Last edited by raptureready; 12-04-2011 at 05:58 AM.