I noticed a few minor image artifacts when using _GDIPlus_ImageScale and _GDIPlus_ImageResize. There was a slight ghost border being created around the edges of the image, and the right and bottom edges had transparency showing through. I created tickets for the issues and also submitted a proposed code fix. Please see Trac #3647 and Trac #3650 for more details if interested. Feedback welcome. ( @UEZ ?)
Thanks