Upon your suggestion, I've downloaded & tested with M15 and viola, the correct content type "image/png"!
The bastard clients are the root of the evil. They are MS I.E. 5.0 Korean version and Netscape 4.51 English version both on Win98 Korean version.
:^)
BTW, could you tell me what part of the source that read the content type sent by the client is, if you write from memory instantly? This newbie have not noticed that, and eager to Read the Source.
In lib/python/OFS/Image.py: The 'manage_upload' method which handles the file upload calls 'self._get_content_type' to find out the content-type. That method returns the content-type header from the file uploaded if provided, otherwise it tries to guess. Brian Lloyd brian@digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com