[Install tool] Image processing doesn't run script of file exists
Make sure that you have been through the Image processing module once, so the test images have been created.
Enter a wrong path in im_path (or imagine that you move a installation, and the path to IM changes) and go to image processing again.
Install tool will report that everything went perfectly and you will see the create test images.
The case is, that no new images are trying to be created (with the wrong im_path!) and you will just see the images from typo3temp
Try and find the image in the typo3temp folder, delete it and rerun the Image Processing, you will now get a error beacause the typo3temp doesn't exists and Image processing will try and create it, with a wrong im_path