I couldn't take a very good picture to really represent what's going on here, but what you see is a very thin white 'skin' over the surface of the beer with small little white patches about the size of a matchhead. The round thing in the middle is actually bubble that has been captured by the skin. ki
The beer doesn't smell bad and it's about a month old. It was two weeks in the primary and two weeks in the secondary. The OG was 1.048 but I haven't taken the FG. I can do that if someone thinks it might help with a diagnosis, but it seemed to ferment in exactly the same way as all the other brews I've done so there wasn't any initial concern. I just noticed it today when I racked another brew to make way for today's cook, so I don't know how long it's been like that.