title: RC file changes fail silently; "Cannot open the resource file for edit"
body: <p>I'm trying to make changes to the resources in a native C++ project using Visual Studio 2008 for the first time in a while. In the past, this has worked, but now the resource editor is failing in strange ways.</p>
  
  <p>If I use the GUI to make a change, the change either doesn't happen at all or disappears immediately. For example, I can try to change the caption on a static text control from "Foo" to "Bar." "Bar" shows up as I type, but "Foo" immediately replaces it when I press enter.</p>
  
  <p>If I try to add a new resource using the Insert items under the context menu of the Resource View, I get an error dialog stating, "Cannot open the resource file for edit."</p>
  
  <p>I've tried the following things to no avail:</p>
  
  <ul>
  <li>Rebooting</li>
  <li>Shutting down Visual Studio, deleting the associated .APS file, and restarting</li>
  <li>Making sure the .RC file was writable (it was)</li>
  </ul>