Hi and thank you for your reply, You were right, using "image/*" as a Media type is not concrete and is converted by default to "application/octet-stream".
This happens in the class 'ConverterService.java' line 329 the media type copied from the source is not concrete, therefore the media type is set to the default - "application/octet-stream". ------------------------------------------------------ http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447&dsMessageId=3051875

