Hey, thanks for replying.
Doing a bit more digging, I was trying to set the cache location using:
Flickr.CacheLocation = somestringpath;
But setting this property appears to make no difference, the API just looks for a cache folder 'FlickrNetCache' in the same directory as the script that's using the API or in the root (I think).
Once i'd esatblished that, no images seem to get written to the cache folder, though i'm only running in debug mode locally at the moment.
Does that make sense or help at all? Is there any other test or investigation you'd like me to try?