Flikr Download
I just found a set of photos from Shmoocon on Flikr that I wanted to download so wrote this little script which takes the url of the photostream and grabs the large images for each of the thumbnails shown. On the few pages I've tested it on it grabs all 18 images from the page without any problems.
Images are saved in the current directory and are named image_X.jpg where X starts at 1 and keeps going upwards.
This is a quick and dirty script, there is very little error checking and it will happily overwrite any existing images so make sure you use directories if downloading multiple pages.