Script Summary: Adds a floating palette of buttons to articles which allows you to go back, archive and return to read later, toggle auto-scroll, or star an article. If you use Instapaper Greystyled, use Instapaper Article Tools instead
Copyright: 2009+, ElasticThreads (http://elasticthreads.tumblr.com/)
License: (CC) Attribution Non-Commercial Share Alike; http://creativecommons.org/licenses/by-nc-sa/3.0/
updated 5/19/2010 updated to fix compatibility issues since Instapaper website changes. Should work just fine again.
If you use Instapaper Greystyled, use Instapaper Article Tools instead