WordPress version: 3.5
Superslider plugin: SuperSlider-Media-Pop
Plugin version: 2.1
I did this: Opened an image in my media library chosen at random, and selected from among the menu of image sizes available (thumbnail, medium, large, post-thumbnail).
I expected the plugin to do this: a popover view of the image to appear in the selected image size
Instead it did this: image opened up in the popover viewer for thumbnail, but would not show for the other image sizes available for viewing. Image viewing was intermittant (and usually not available). What I got was a blank, white page.