What the heck?! If you've spent more than ten minutes just trying to find where to set EDITANDCONTINUE property in VC++ project property page, you are not alone. It can be set through: (Under Project Property Pages) Configuration Properties -> C/C++ -> General -> Debug Information Format.
OK. Now I've set it NOT to be /ZI and disabled incremental link, why the darn VS still complain the same warning. Remember that no matter how bizarre a problem seems to be, computer always works as expected. Why don't you check the project properties of other projects that this project depends on?