Not working in latest firefox build Rated 5 out of 5 stars

I love this add-on. Up till yesterday it worked like a dream in all windows versions of Firefox. Since update 17.0a1 (2012-07-21), however, the sidebar is gone and all tabs are back to the top. There's no way I can change it back in the Tree Style Tab settings.I would highly appreciate if you can make it work again.

This review is for a previous version of the add-on (0.14.2012050301.1-signed).