Particle board sitting directly on seemingly dry concrete will often wick up moisture like a sponge. My Fathom is unfortunately the same way. The cabinet isn't perfect, but the stenciled sides are so nice that I won't consider repainting, and am not even sure that I'll touch it up. That rear/back panel of the lower cabinet has slight swelling and crumbling at the edge from what I'd bet was sitting on a concrete floor. I'm on the fence about clamping and using wood hardener or replacing the panel, since it's only original once. The back of the head only has slight swelling in one place, at one of the cutouts near the top. I'll clamp that down with wood hardener and it will be hard to spot the repair.