I just downsize a 48kb gif to fit as an avatar fron 180x180 to 100x100 wich ends up with 69,8kb without smooth resize.
This is not to much increase but resizing a 750kb file result in a 1.3 meg file which I can't host in the image site I use
Is it a bug or what cos I did the same on Abobe Image ready which is a very dificult prog for me and the results are as expected 700 kb to 500 kb.