Ah, apologies, I didn't know you were a homebrewer. Sometimes when people on the internets talk about beer, anything that doesn't taste like what they are used to is of concern. I haven't brewed for a few years. Even though I was pretty decent at it, the occasional infected or oxidized bottle would turn up. So if you are anything like I was, you definitely know a bad bottle when you taste one.
Anyhoo, I can only recall one sixer I've ever had that was soured. It was Rahr's Ugly Pug last fall. If I were you I'd shoot Real Ale an email and see what they say.
