1. Protect sheet but keep "insert link" unchecked; i.e. disallow insert link.
2. In unlocked cell A1; enter http://www.zkoss.org
3. Should see A1 appear a STRING http://www.zkoss.org
4. Press F5 to reload the test case.
5. Protect sheet but keep "insert link" checked; i.e. allow insert link.
6. In unlocked cell A1; enter http://www.zkoss.org
7. Should see A1 appear as a LINK with underline.