Went into the basement to check things out and saw this:
I've never seen this before. I looked up close and I didn't see any solids in the "clumps". They're just bubbles in clusters.
FYI. The two carboys are not the same batch. They're both stouts but a week apart. The one in question is 1 week in the secondary and the closer one is 2 weeks in the secondary.
My first thoughts were "Aw crap, it's gotten contaminated" but I wanted some of your thoughts.
The brew is the Guinness Clone recipe in the BYO 150 clone magazine.