Manually flush ImageCache cache? Im using ImageCache but I've since modified some of the original image files in my Drupal site. The reason being I needed to modify images uploaded to nodes but don't want to manually add them all again. Can I now manually flush ImageCache's cache? 

Thanks
Just display list of all presets, there are links for flushing presets.
Presets list is available at /admin/build/imagecache/list

Flushing urls of respective presets would be /admin/build/imagecache/[preset_id]/flush