Empty tab bug Rated 5 out of 5 stars

Very useful add-on for Firefox, but have a ugly bug at last 3 or 4 version of Firefox.
Mouse middle click on link open 2 pages (one with needed link and one empty page "javascript:void(0);"), i think add-on setting "Close extra empty tab created on anchor click" not work, please fix it.

This review is for a previous version of the add-on (1.6.0.12.1-signed).