User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.2a1pre) Gecko/20090131 Minefield/3.2a1pre Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.2a1pre) Gecko/20090131 Minefield/3.2a1pre When using the All Tabs preview, the textbox allows you to undo even though the user has not entered any text. Reproducible: Always Steps to Reproduce: 1. Click the All Tabs button 2. Right click and select Undo from the textbox 3. Actual Results: The textbox displays 'Search Tabs' Expected Results: Cannot undo as the text hasn't been changed. Or the textbox displays 'Search Tabs' as info text like the search bar when it does not have focus or text.