Have a look at this thread:
http://railsweenie.com/forums/3/topics/1253
On Apr 15, 9:57 am, Hunter Hillegas
<l...-HAWAbpnI61OZ1JSuHaJ1sQC/G2K4zDHf@public.gmane.org>
wrote:> Howdy,
>
> We had to change the number and specs for thumbnails generated by
attachment_fuand so now we need a way to go back and have it re-
> render/create those versions.
>
> How can we do this programatically? Re-uploading all the images is
> not really an option.
>
> Anyone have any suggestions?
>
> Thanks,
> Hunter
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