IE 9 mosaic dataset discolor colormap

[gisscconsulting]

I have a mosaic dataset (hundards of rasters with colormap built in) published as image service.

After imageServiceLayer.setOpacity(0.4);
I also set mosaic rule to show 1 image at a time

The color of the image seemed faded and discolored in IE 9 when I pan and zoom. In FireFox the color retains.

IE seems can not get image ransparency right?

[gisscconsulting]

After chat with ESRI analyst, the solution is to use setOpacity before addLayer event.
           
imageServiceLayer.setOpacity(0.4);
map.addLayer(imageServiceLayer);

If is setOpacity is used after addLayer event, IE tends to have problems.

dojo.connect(imageServiceLayer, "onLayerAdd",function()){
    imageServiceLayer.setOpacity(0.4);
}



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