Quote Originally Posted by torstan View Post
You can also use Layer-Transparency->Set Colour to Transparency with the colour select set to either white or black to get the backgrounds to be properly transparent. This works particularly well after using fuzzy select with feathered edges.
Be careful with that, however, as will take ALL the white out of the image and turn it transparent, so anything white will be transparent, and anything partially white (i.e. grey) will end up black and partially transparent!

-Rob A>