I have a one month old Van Dessel Rivet that I love but the frame has developed a creak. It's really irritating me. It happens when under load, i.e. I'm standing on the pedals, but I don't think it's the bb because it seems really tight. I've greased all of the threads I can think of and checked the all the bolts to make sure none are loose. Should I ignore it or does someone have another idea? Is this typical of carbon frames? It's my first.