It looks like the 2.7 checkin has caused a number of buildbots to fail.  Examples:

http://buildbot.python.org/all/builders/AMD64%20Ubuntu%20LTS%202.7/builds/1094/steps/test/logs/stdio

======================================================================
ERROR: idlelib.idle_test.test_textview (unittest.loader.ModuleImportFailure)
----------------------------------------------------------------------
ImportError: Failed to import test module: idlelib.idle_test.test_textview
Traceback (most recent call last):
  File "/opt/python/2.7.langa-ubuntu/build/Lib/unittest/loader.py", line 254, in _find_tests
    module = self._get_module_from_name(name)
  File "/opt/python/2.7.langa-ubuntu/build/Lib/unittest/loader.py", line 232, in _get_module_from_name
    __import__(name)
  File "/opt/python/2.7.langa-ubuntu/build/Lib/idlelib/idle_test/test_textview.py", line 11, in <module>
    requires('gui')
  File "/opt/python/2.7.langa-ubuntu/build/Lib/test/test_support.py", line 359, in requires
    raise ResourceDenied(_is_gui_available.reason)
ResourceDenied: Tk unavailable due to TclError: no display name and no $DISPLAY environment variab [...]

and:

http://buildbot.python.org/all/builders/AMD64%20Snow%20Leop%202.7/builds/440/steps/test/logs/stdio

======================================================================
ERROR: idlelib.idle_test.test_textview (unittest.loader.ModuleImportFailure)
----------------------------------------------------------------------
ImportError: Failed to import test module: idlelib.idle_test.test_textview
Traceback (most recent call last):
  File "/Users/buildbot/buildarea/2.7.murray-snowleopard/build/Lib/unittest/loader.py", line 254, in _find_tests
    module = self._get_module_from_name(name)
  File "/Users/buildbot/buildarea/2.7.murray-snowleopard/build/Lib/unittest/loader.py", line 232, in _get_module_from_name
    __import__(name)
  File "/Users/buildbot/buildarea/2.7.murray-snowleopard/build/Lib/idlelib/idle_test/test_textview.py", line 11, in <module>
    requires('gui')
  File "/Users/buildbot/buildarea/2.7.murray-snowleopard/build/Lib/test/test_support.py", line 359, in requires
    raise ResourceDenied(_is_gui_available.reason)
ResourceDenied: gui tests cannot run without OS X window manager