It’s not working for me either, and I’ve tested this on 4 separate installations for 4.2+. Does it have anything to do with WordPress converting databases to utf8mb4 in 4.2? Though utf8mb4 should be 100% backwards compatible with utf8…
With debug mode on, after a search, WordPress would throw many WordPress database error: [COLLATION 'utf8_bin' is not valid for CHARACTER SET 'utf8mb4'], and display no results.
