We use your imageman DLL suite (version 8.76). When resizing tif/tiff images we sometimes have issues with imageman coverting a color image to be grayscale. I've tested a few tiff images and the problem seems to be for tiff images that are of TrueColorAlpha type (this is according to ImageMagicK). I've tried setting the TIFF_COLORMODEL option to RGB (2) or RGB Palette (3) to fix this but I haven't had any success with this. Does imageMan just not support this tiff format? Also would using imageMan version 8.84 make any difference?
There should not be any issues with that tiff format, I would suggest upgrading to the latest build. If you still have the issue we can see what can be done.
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