I was excited to hear about this plugin because I do not hardcode urls like most people and secondly because who wants all those thumbnails laying around if we don't need them, right? But it's vague use of instructions had me thinking I needed to uninstall Regenerate Thumbnails first. So did. I used this and all 29 thumbs that I had were failures. So without panic I simply reinstalled Viper007's version and tried to regenerate and all were failures again. Eek.
So then I decided to uninstall your plugin and regenerate again with Viper007's version and bingo, all was back to normal, no failures.
So..Additionally I thought well, maybe because I uninstalled viper007's version in the first place was the wrong thing to do so reinstalled your plugin with viper007's version and tried again. Again your plugin failed to regenerate any thumbnails. So now I'm scratching my head wondering why?
What is the proper use for this plugin? And why did I regenerate nothing but failures with or without viper007's version installed?