I have been back to my Ford dealer twice for the same problem - the weather stripping across the rear window crumples and comes off, slipping down the window track. this causes the window to rattle with even normal road vibration. when i took it back in the first time, it was under original warranty (this happened within the first 10K miles) and they replaced the entire window which seemed a little nuts since there was nothing wrong with the window. At about 40K miles, the second weather strip was almost completely off and i took it back again. I was told it was out of warranty. I've owned a 2003 Sport Trac previously, trading it in at 90K miles and it never had this problem. Has anyone else had the same issue?