I bought this lens from Best Buy to try it out and then returned it and got it from Amazon for cheaper. I really like it but I have heard that some copies can produce slightly fuzzy results. I think I am noticing this in the copy from Amazon. I did notice a physical difference in the two lenses as well. The one from Best Buy had symbols for the on/off states of the IS (|/O). The copy from Amazon actually says On/Off in place of the symbols. I'm wondering if anyone knows anything about this. Which one is the newer version? Comments on fuzzy copies of this lens? Thanks.