User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0b11) Gecko/20100101 Firefox/4.0b11 Build Identifier: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0b11) Gecko/20100101 Firefox/4.0b11 I have Homepage set as blank page. When I open Firefox, click somewhere to deselect the location bar and after location toolbar has been deselected hover over a bookmark, text "undefined" overlaps "Go to a Web Site" text. Here is a link to screenshot: http://i.imgur.com/EiDTR.png This only happens after you open new Firefox window. Reproducible: Always Steps to Reproduce: 1. Start Firefox. 2. Click on empty space anywhere on screen to deselect location toolbar. 3. Hover your mouse over a bookmark in the bookmark toolbar. Actual Results: Text "undefined" overlaps "Go to a Web Site" text in location toolbar. Expected Results: It should not overlap "Go to a Web Site" text with "undefined".

This was fixed by landing of Bug 541656.