I am experiencing a creak that will not go away. Tried everything: different carbon post, torque ranges, grease, silicone, tri-flow. friction paste. So far nothing stops the creaking. Its most noticeable when steering side to side or when climbing seated, but also when pedaling even casually on flat ground. Does not creak when standing (so far). Took it to a local dealer and was told the top tube is loosening in the lug at the seatpost. That does not seem likely to me as I cannot get it to creak when pushing and pulling on the frame and it does not creak when standing and pedaling hard. I read a post somewhere that the frame could have a seat collar that is ill-fitted, which allows some side-to-side movement. That seems a very plausible cause to me. Anybody have any experience with either the seat collar or tubes separating from lugs. The frame has been in service since 07 and is probably an 05/06 model year. I do not really want to take it apart and have it shipped out for possible diagnosis, unless absolutely necessary --seems a bit extreme for such an issue. Thanks for any feedback.