[lonesouth]

Mine does the exact same thing. It appears to me that mine would go "off the track" and would bind sometimes when closing. This was usually accompanied by popping sounds if opened all the way or tilted or closing. I took it to the stealership a couple times and they never had any problems. Eventually, when driving here to there, I would just open and close and tilt and close and open and so forth, cycle to the sun roof hoping it would just break. Finally I heard a new noise, not the usual pop or click and it appears to have gotten back on the "track" and has been working fine since then.

Mine was binding on the drivers side, if I grabbed the sunroof as it was closing and pulled on it to get past the bind, it would close all the way. I also noticed that it sounded different and moved slower when opening/closing when it was "off track".

HTH