When I attempt to add an image to a page, it gives me "An error occured[sic] while uploading the image". This is whether I am uploading a new image or taking one from my previous uploads. When uploading a new image, it is still successfully uploaded to my personal gallery, but not added to that game.
Example page: Velocity 2X
The above game clearly has at least one image as there is a main image, but the Images says it has 0. Also, the Images page shows a never-ending loading animated GIF. When attempting to add a new image, the above error occurs.
Using Firefox 23.0.1 on Windows 7. Also tested on Chrome 29.