Automattic/Co-Authors-Plus — pull request #221 by nickdaugherty (2014-09-05 18:55:35+00:00)
Title: Bring back strict equality checks in guest author lookup caching

The non-strict equality check causes negative cache entries to always
hit the database and re-set themselves.

This reverts commit 6ad24ff7f853f7c6df613456f02051d711456a65.

See #218

Fixes #219