2006/12/3, Sjoerd Hiemstra <shiems146@kpnplanet.nl>:
(Create new file with transparent background, copy the red curl into here using the 'Select contiguous regions' tool, Image > Mode > Indexed and save as .gif)
You'd better to go into the "Layer" / "Transparency" menu and choose the "color to alpha" option. It will usualy automatically make the transparency look fine AND handle the "blurry" border selection smoothly (in my opinion). And starting from the large "gimp" file source of course !