Ah, I wanted to open a brand new topic but this one is fine.
Indeed, Adobe released Camera Raw 5.5 and DNG Converter 5.5 which handle E-P1 RAW files.
But, as stated in this thread on Adobe forums :
http://forums.adobe.com/message/2102988#2102988 , I find that the produced DNGs are unreadable by Aperture (though they are fine with Lightroom for instance).
The guys at Adobe advise me to bring the problem here as they assure that the produced files are valid DNGs.
Thanks in advance.
Message was edited by: guerom00