Flickr restricts 'right-click saving' of images from their website. This can make it painful to save a local copy of an image.
This user script makes it a lot simpler by adding a 'download' link to the menu bar on Flickr photo pages. The script is modified from the original flickr download link' script by Samuel Essig.
Tested on Google Chrome & Firefox 4/5/GM 0.9.3.
The user script can be downloaded here.