I've been riding my 2006 Giant TCR carbon on the trainer this winter using a cycleops fluid. I've been clamping the rear triangle fairly tight but I don't think too much. When cleaning it the other day, I noticed some paint cracks near the non-drive side drop out. Cannot tell if it's just paint or something worse. The bike doesn't make any funny noises when I ride it. I'm thinking the clamping force of the trainer may have cracked the paint but hoping nothing worse than that. Any advice is appreciated. By the way, does anyone know Giant's warranty policy?