I have a PNG with a completely transparent background as well as semi transparent pixels around the main image (think shadows / blur).
On its own, it displays as I expect. If I use it on a web-page, the page background colour shows through the transparent and semitransparent pixels with the various levels of opacity. Good.
However, when I paste this alpha image into a separate PNG image ( which has no alpha ) in a new window in GIMP, the semi transparent pixels loose their alpha settings and become completely opaque.
How do I fix this?