facebook/wordpress — pull request #356 by niallkennedy (2012-12-20 18:13:06+00:00)
Title: a more cautious approach to widget loading

Widget loading might fail for various reasons. Try to fail more silently.

Some sites might run into PHP cache issues after upgrading. A class might already be defined. An assumption about a file location relative to our plugin base might be incorrect. Run additional checks when loading widgets.