Transparent images in reports?

Hello,
I am quite sure that this problem has been discussed here before, but I couldn't find a definite answer for it.
I am using Reports 10.1.2.3.0 and want to insert an image with a alpha channel into a PDF report. I would like to use a *.png, but *.gif would be ok for me too. It doesn't matter where the image has to be stored, either filesystem, in the DB or embedded in the *.rdf is fine for me.
I don't want to create something like a watermark "behind" the stuff in the report (no problem with this), I want to overlay this image on top of a scanned signature. No, I don't want to do this in photoshop since we have quite a few signatures and would have to do this for every one of them.
So here is the question: Is this possible?
I can get a *.png in the PDF, but the pixels where alpha is 100% get rendered in black.
When I try this with a *.gif I get the following "interesting" error (the gif was created with GIMP and has an optimized indexed palette):
Internal error
REP-62204: Internal error writing the image BandCombine:
a row of the matrix does not have the correct number of
entries, should be OpImage.getExpandedNumBands
(source0.getSampleModel(), source0.getColorModel()) +
1..
REP-0069: Internal error
REP-50125: Caught exception:
java.lang.NullPointerException
REP-0002: Unable to retrieve a string from the Report
Builder message file.
REP-536870981: I dind't open an SR yet, but this would be my next step.
Thanks and Regards
Markus

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pepe
pepe
pepe25
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Message Edited by csmrunman on 01-15-2010 10:18 AM

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