Rebuild images from image style I have an image style in Drupal 7. I attached several images to a nodes and display the images based on this style. I then changed the effects on this image style but the existing images are not being recreated with the new image style effects. They show with the old image style effects.

If I attach new images, they use the new effects. Deleting an existing image and re-uploading causes the image to use the old effects.

The manual (incorrectly I assume) states that just saving an image style causes a rebuild:
http://drupal.org/documentation/modules/image

I have cleared the cached.

How do I force a rebuild?
Clearing cache, won't flush image styles: http://drupal.org/node/997332

You could: 


delete them manually 
use image_style_flush
use the command line: rm -rf sites/default/files/styles
use drush: drush image-flush