[thelist] .htaccess no-cache rule nneded to target a specific image file

[Dunstan Orchard]

Hi there,

I have a PNG which is dynamically generated by the server.
Although the image contents changes, the file name stays the same.
I'm finding that the image is being cached by people's browsers, so the 
alterations aren't being seen.

Can anyone point out the appropriate htacesss rules that would let me 
stop caching on this specific image.

Thanks very much - Dunstan

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