I went to my dealership to check to see if the repair I had done was done according to the Service Bulletin? The Service Bulletin came out 5 days after my repair, so they only fixed the strut that was creaking. Not both sides, which is required in the TSB. And they can't do anything about it...
I had the same problem. According to my dealership, it was a faulty strut mount. And mine started with only about 1,000 miles on it. They took care of it, and no problems since.