I love this plugin.
Only one question. I am seeing the same behavior that was described in this closed thread:
http://wordpress.org/support/topic/287672?replies=3
Even with "Enable database result caching" checked, the page is using Flickr image URLs for subsequent page requests, rather than the database.
I have turned off total caching.
Any suggestions for activating the image cache?
My plugin is not caching images. It's just caching the API calls to Flickr to save time generating the HTML.
I see. Some public WiFi spots block flickr URLs.
Maybe W3TotalCache can cache those images?
Update: W3 Total Cache slowed down my multi-site backends so much, that I'll try Super Cache again.
I'm not sure if Super Cache will save images from other services, but let me know if it does work.