Steps to reproduce: 1. Go to your favorite contentEditable based rich text editor (like http://www.mozilla.org/editor/midasdemo/) 2. Type "Foo Bar" on the first line (without quotes). Press Enter. 3. Type "Baz" on the second line. (html is Foo <span class="Apple-style-span" style="text-decoration: underline;">Bar</span><div>Baz</div>) 4. Double-click on "Bar" to highlight it. 5. Press underline from the toolbar. 6. Go to the beginning of the second line. 7. Press Backspace. Result: Everything moved from the second line to the first is underlined (html is Foo <span class="Apple-style-span" style="text-decoration: underline;">BarBaz</span> Expected: Just "Bar" to be underlined. Notes: I've repro'ed on Chrome 1.0 Windows and a webkit nightly on Mac. This also repros if you use delete at the end of the first line, rather than backspace at the beginning of the second line.
Looks like you filed this twice. *** This bug has been marked as a duplicate of 23993 ***