[OpenLayers-Users] RGBA PNG images an transparency?

[Stephen Woodbridge]

Hi all,

I'm using mapserver AGG outputformat to generate 32bit RGBA PNG images 
that where I want the background color to be transparent. My problem is 
when I load the images into OpenLayers the background is black which is 
what I set in mapserver.

Does anyone know what the trick to getting this to work correctly?

Thanks,
   -Steve