You may want to see
For more info about this.

In a nutshell, only a very few browsers support transparent PNG's.
Netscape for Linux doesn't support them at all.  This is very
disconcerting and it's why I couldn't change my sites over.  ESR had an
absolute fit at me over the VA Linux site and Don Marti just kinda

If you can alter your design to get around using transparencies, it would
be great!  Try making your image background color match your bgcolor.  

But that's not the problem you are having.  Your problem is due to the
fact that GIMP requires you to convert to RGB before it will save a PNG.
I believe that later versions of CVS GIMP have fixed this. 

Good Luck!

Amy Abascal

On Fri, 22 Oct 1999, James Knowles wrote:

> Hi,
> I'm trying to convert GIFs with transparencies to PNGs using GIMP to
> produce a 100% GIF-free site.
> I take the following steps:
> 1) Open the GIF (for example, the gfx_by_gimp.gif "Graphics by GIMP")
> 2) Select "save as"
> 3) Select PNG type
> 4) Save 
> 5) PNG options (compression) dialog comes up - OK
> 6) I get a dialog that simply says "save failed - <filename>"
> It seems obvious that I'm missing a step, but I'm not sure what. I may
> be blind, but I can't find it in the docs. 
> I hate to admit that in my frustration, I tried using a [m$] program. It
> didn't even attempt to preserve the transparency. Ack!
> GIMP 1.04
> RH 6.0 
> Linux 2.2.3 with special SMP patches
> Thanks for any suggestions,
> James
> -- 
> Running NT is like listening to Kenny G with a kazoo.

--Amy Abascal
"A penny for your thoughts, a nickel for your neck!!" 

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