I had this lens for quite sometime but I have never encountered this problem although this is widely known that the 17-55 is a vaccum cleaner. Maybe this is applicable to those who tend to do a lot of pumping action with their zooms :P


But the point is that it came to you brand new but with dust already. I agree with the previous posts that you should return it and get a new one. It's one thing to get dust after you use it rather than when you just opened it in the box.