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Joakim, Allen, Charles, Katie, thank you very much for your comments, and thanks for the likes too!
Charles, beautiful moonlight shots! Too bad you don't carry a tripod (I never do )
Katie, nice self portrait! As for the Italian flag, other than the excellent cornerfix, there is also a free plug-in from adobe for LR. I think it works equally as well, but it's easier to make profiles than cornerfix. As far as I'm concerned, I consider the mechanical vignetting and Italian flag as a fact of life. I never try to remove it neither use the in-camera lens profiles. If the corner shift is too annoying, I just crop it out, but I have to mention that I rarely get it with the lenses I have.
CVickery, nice shot!