You might get the “This Image Or Video Is Currently Unavailable” message appear as a popup when you click through on a thumbnail on a Slickr Flickr gallery.
This is because the photo is not available on Flickr at the size requested.
To check what sizes are available for a photo, find the photo on Flickr, click on the Actions dropdown, and select the View all sizes option.
It will look a bit like this:

Example of Unavailable Photos
The following shows a gallery at two different sizes: medium ,where all the lightbox photos are available; and Medium 800 where the larger lightbox photos do not exist.
Medium Gallery
If you click a thumbnail below the “Medium” photo will be displayed in the lightbox
slickr-flickr tag="kerswell wildlife" size="medium"
Medium 800 Gallery
If you click a thumbnail below the “Medium 800″ photo is not available on Flickr so instead you see an error message in the lightbox
slickr-flickr tag="kerswell wildlife" size="m800"





































