[Magick-bugs] =?ISO-8859-2?Q?Adding color borders to a PNG file with transparency colors all image backg= round. ?=

[krip at onet.eu]

I want to add green borders to attached png file, with command: convert -border 10x10 -bordercolor 'rgb(60,200,0)' -background 'rgb(255,255,255)' dvorak.png dvorak-borders.png

Unfortunately, it makes all the image green (because it uses transparency). It seems, however, that bordercolor should only affect colors of the border, not background (which I set to white). 

Is this a bug? Is there a workaround ?

Regards, 
Marcin