I do believe that I may have found a bug.

http://www.imageswarm.com/view/1600 - The image shows up just fine.

However, when I linked directly to the image http://www.imageswarm.com/thumb/1600.jpeg, it says it's been deleted due to inactivity, even though it hasn't been 15 days(setup in the config).

http://www.imageswarm.com/image/1600.jpeg also displays the picture correctly. What's the deal?

whoops, sorry about that, I'll make the upgrader for 0.7 reconstruct missing thumbnails.

Replace the admin.php and fakecron.php.