Has anyone had this problem? My '06 carbon compact cannondale si crank arm came loose. not from the BB, but from the aluminum insert that bolts to the crank. it would wiggle like it was loose on the BB, but when we checked the BB was fine, the interference fit was fine, couldn't see any problem. THen we put a wrench on the crank arm off the bike and could actually see the aluminum fitting move inside the carbon arm. The LBS had another off a warranty bike and checked it.. same problem. that's what it was warranteed for. bike is tecnically out of warranty but i think my lbs will get it done for me. just checking to see if anyone else has had this problem. Design changed in '07 and got recalled on that one, so mine may be a bit of an orphan.