title: Xcode crashes when adding a new language for localization/translation
body: <p>Whenever I add a new language to Xcode (Project -> Localizations -> +), Xcode crashes immediately. Here is the error:</p>
  
  <pre><code>Process:         Xcode [1362]
  Path:            /Applications/Xcode.app/Contents/MacOS/Xcode
  Identifier:      com.apple.dt.Xcode
  Version:         4.4.1 (1488)
  Build Info:      IDEApplication-1488000000000000~2
  App Item ID:     497799835
  App External ID: 9950605
  Code Type:       X86-64 (Native)
  Parent Process:  launchd [132]
  User ID:         501
  
  Date/Time:       2012-09-10 11:53:15.906 -0700
  OS Version:      Mac OS X 10.8.1 (12B19)
  Report Version:  10
  
  Interval Since Last Report:          3309 sec
  Crashes Since Last Report:           5
  Per-App Interval Since Last Report:  3139 sec
  Per-App Crashes Since Last Report:   5
  Anonymous UUID:                      6F2A1E95-B759-4403-BA5B-A1D00B69A631
  
  Crashed Thread:  0  Dispatch queue: com.apple.main-thread
  
  Exception Type:  EXC_CRASH (SIGABRT)
  Exception Codes: 0x0000000000000000, 0x0000000000000000
  
  Application Specific Information:
  ProductBuildVersion: 4F1003
  ASSERTION FAILURE in /SourceCache/IDEXcode3ProjectSupport/IDEXcode3ProjectSupport-1559/Xcode3Sources/XcodeIDE/Frameworks/DevToolsBase/pbxcore/Xcode3Model/Xcode3VariantGroup.m:709
  Details:  Assertion failed: [newFilePathString hasPrefix:self.resolvedFilePath.pathString]
  Object:   &lt;Xcode3VariantGroup: 0x4017fbe00&gt;
  Method:   -addNewReferenceForLocale:filePath:fileType:
  Thread:   &lt;NSThread: 0x40030a220&gt;{name = (null), num = 1}
  Hints:   None
  </code></pre>