World of Warcraft down for maintenance Thursday, Feb. 20

Moments ago, the @BlizzardCS (Blizzard Customer Support) Twitter account announced downtime for all Blizzard games scheduled for Thursday, February 20, from 5 a.m. to 11 a.m. Pacific.

Thursday downtime is unusual, but may be intended to address the unanticipated issues caused by the release of patch 5.4.7.