Rated 4 out of 5 stars
Works fine for me on Thunderbird 17.0 and win 7 32 bit. Would love to see this add-on with the icon set from Thunderbird 16.0 before color icons were lost in version 17.0. I've noted that the look of the color icons is enhanced on win 7 if you run thunderbird in XP 3 compatibility mode and turn off/disable desktop composition and Display Scaling.This review is for a previous version of the add-on (2.6.0).
Email me (links are on my Home Page) and I can send you a test version with 16.0 color icons if you care to try it out.