title: Codesign of Dropbox API fails in Xcode 4.6.3: "code object is not signed at all"
body: <p>I have an OS X app that's distributed through the Mac App Store, and recently updated to Xcode 4.6.3.</p>
  
  <p>When I run my regular build now, I receive:</p>
  
  <pre><code>Command /usr/bin/codesign failed with exit code 1:
  
  /Users/Craig/Library/Developer/Xcode/DerivedData/Mac-dxcgahgplwpbjedqnembegifbowj/Build/Products/Debug/MyApp.app: code object is not signed at all
  In subcomponent: /Users/Craig/Library/Developer/Xcode/DerivedData/Mac-dxcgahgplwpbjedqnembegifbowj/Build/Products/Debug/MyApp.app/Contents/Frameworks/DropboxOSX.framework
  Command /usr/bin/codesign failed with exit code 1
  </code></pre>
  
  <p>I can't seem to discern any other changes in my project, so I can't tell if it's an issue related to the 4.6.3 update, or something else.</p>
  
  <p>I have tried restarting Xcode, running a clean build, and cleaning the build folder.</p>