A merlin bug fix (4287053) which was aimed at making JTabbedPane
   exception throwing more consistent and clearly documented,
   has resulted in an incompatibility that is causing problems for
   at least two real applications we are aware of: IntelliJ and
   JBuilder.
   
   Essentially, the setSelectedIndex() method of JTabbedPane previously
   accepted a value of -1 as valid, which was used internally to
   clear the selection when no tabs were present. The fix modified
   setSelectedIndex() to throw an IndexOutOfBoundsException for the
   -1 case (consistent with other JTabbedPane methods).
   
   Now that we've discovered programs were depending on this
   undocumented behavior, we believe we should document and fix
   setSelectedIndex() to again accept a value of -1 to clear the
   selection.