There were some in-game fixes applied during the past week that were not part of the most recent patch.  They range from fixes to the Yogg-Saron encounter to small player ability and spell fixes.  The complete list is below:

The time between Mole Machines spawning in the Razorscale encounter has been slightly increased.
The Yogg-Saron encounter [...]

Read in full at WoW In-Game Fixes 4/23