In message <[EMAIL PROTECTED]>
on Mon, Nov 08, 2004 at 07:45:52PM +0800, Antony N. Lord wrote:
> A PC here in the office uploads (FTPs) a webcam image to an OS X 
> machine (webserver) with -rw-r----- permissions. This image can't be 
> seen when used in a HTML document.

(a) Fix the webcam software (which you have ruled out).

(b) Change the group ownership of the file to whatever group the
webserver runs as. You may also need to change the group ownership of
the enclosing directory to make it stick (and set `chmod g+s .`, if
necessary for the filesystem/file functions used with your FTP).