diff -urN cmake-2.8.4.old/Modules/FindPythonInterp.cmake cmake-2.8.4/Modules/FindPythonInterp.cmake
--- cmake-2.8.4.old/Modules/FindPythonInterp.cmake	2011-02-20 19:32:16.545655003 +0100
+++ cmake-2.8.4/Modules/FindPythonInterp.cmake	2011-02-20 20:22:37.597936743 +0100
@@ -26,6 +26,7 @@
   ${Python_ADDITIONAL_VERSIONS}
   2.7 2.6 2.5 2.4 2.3 2.2 2.1 2.0 1.6 1.5)
 
+set(_Python_VERSIONS "")
 # Run first with the Python version in the executable
 foreach(_CURRENT_VERSION ${_Python_VERSIONS})
   set(_Python_NAMES python${_CURRENT_VERSION})