title: xcode 5.1.1 data tips fails in debugging
body: <p>Hover fails to display a value. There is no eye and info button. Clicking on the triangle next to a variable drops a menu that starts with Edit All In Scope. </p>
  
  <p>After using Xcode 3.2.6 in OSX 10.6, I'm starting to use Xcode5 in OSX 10.9. It worked OK for a few weeks on new projects and downloaded examples, including data tips. Then a series of quirks associated with Custom View prevented its display. Breakpoints showed that drawRect was running. Only the main window appeared in Run. I found that in the Inspector, MyClass was not in the list of Classes.
  Sometimes MyClass.h and .m file names appeared in red and the files were empty. Deleting Library>Developer>Xcode a couple times fixed these problems when they occurred, but only temporarily. Then I deleted Xcode.App and downloaded a new copy.</p>
  
  <p>This seems to have taken care of all but the data tips problem. Projects do display the Custom View and its contents correctly, but data tips are absent.</p>
  
  <p>How can I make it work correctly?</p>
  
  <p>more information: I ran DiskWarrior and found no faults in Xcode and related files.</p>