User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.9.0.1) Gecko/2008070208 Firefox/3.0.1 ImageShackToolbar/5.0.0 Build Identifier: Lightning 0.9 2008033120 The link above shows the problems I have with Thunderbird since I updated Lightning from 0.8 to 0.9. See the red figures that mark the problems 1: The first menue is not indicated (I don't know it's name in English), allthough it works if I click where it should be. 2: Between the two lines I actually placed the <<previous and next>>-buttons from the Buttons!-add-on. Everything is fine again if I deactivate just one of the two add-ons. Reproducible: Always Steps to Reproduce: 1. Install Buttons! 0.5.3.2 2. Install Lightning 0.9 3. Open an email Actual Results: See screenshot at http://img88.imageshack.us/my.php?image=lightning09mp8.jpg Expected Results: All menues are displayed normally and all buttons are visible and work just as they did with Lightning 0.8 I run Thunderbird 2.0.0.16 Build 20080708