Hi,

On 14.02.2011, at 12:50, Ivan Tkatchev wrote:
> Please see the relevant discussion and patch here:
> 
> http://stackoverflow.com/questions/4217869/python-pil-all-areas-of-png-with-opacity-0-have-their-opacity-set-to-1
> 
> This is a very serious bug that affects many upstream packages. 

It's questionable if this is a serious bug. It's more a missing feature (read 
alpha from paletted images).

> It would be nice if a fix made its way into the official PIL release so that 
> users would not have to suffer.

I did some contributions to improve the PNG handling and there are already in 
the development trunk for 1.2. You can get a source package here: 
https://bitbucket.org/olt/pil-2009-raclette/get/tip.tar.bz2

Regards,
Oliver
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