My studio is upgrading to 2011, but will need to continue support 2009 until everyone has migrated.
With 2009, we add the path to our python scripts/modules to the PYTHONPATH env var. Now that pymel is part of the maya install, what would be the best way to prevent the "old" version of pymel from being imported when using 2011, but forcing 2009 to import the "old" version? -- http://groups.google.com/group/python_inside_maya
