Several months ago when I had the tires rotated, I had them look at the pano roof because it was juddering when opening. They lubed the cables and said it was important to catch it early so the cables didn't stretch. Now it's started squeaking when opening. The car is already scheduled to be serviced to replace a front bushing, so they'll look at it at the same time. Are other people seeing this problem? It seems like a pretty significant issue.