First of all, congratulations. This is the only nofollow plugin I've tried that works on Amazon links.
Now the issues I'm seeing:
1. The tags are getting doubled. I'm seeing rel="nofollow" target="_blank" rel="nofollow" target="_blank" on each external link
2. target="_blank" is also getting applied to my jump links like #more
Any chance of getting a fix? Give me a quote if I need to pay for it.