Some of my WordPress posts end with a & character?? Strange!

Author Message E R Posted: 12/6/2012 Quote message  Hello, I created a sitemap and saw that several of my posts end with a "&" character. Those links also generate 404's Does anyone know what happened? Thanks for any advise. P.S. Here is a sample link which I see in the 404 list http://prepiano.com/play-anyone-can-play/ma& My website automatically displays a random post but still, I am puzzled regarding the & character including the letters /ma in the above example.   Garry Posted: 12/7/2012 Quote message  Try reverting back to default permalink structure for testing.