I don't think that's it's a web server thing, because he's dynamically 
generating the images and not using a .jpg extension. Doing it this way allows 
you do such things as resize the image on the fly using URL parameters. 
Something like:

src="/images/showImage.html?imageid=123456&size=800x600

the HTTP response headers would probably shed the most light on the problem, 
nudge, nudge;-)

>>-----Original Message-----
>>From: Gunnar Hjalmarsson [mailto:nore...@gunnar.cc]
>>Sent: Thursday, July 02, 2009 1:24 PM
>>To: beginners-cgi@perl.org
>>Subject: Re: content type headers
>>
>>Hellman, Matthew wrote:
>>> The answer to your problem seems to be making sure one and only one
>>> content-type header is returned with the image, and that it has the
>>> correct value (e.g. Content-Type: image/jpeg or whatever).
>>
>>Right, and it just struck me that this is probably a web server
>>configuration issue. A sensibly configured server should send the
>>correct content-type header out from the file extension.
>>
>>Please see the attached file, which is the config file for this purpose
>>on my own (Apache) server. There you can see that a jpg extension
>>results in content-type image/jpeg, a png extension gives image/png etc.
>>
>>--
>>Gunnar Hjalmarsson
>>Email: http://www.gunnar.cc/cgi-bin/contact.pl


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