All U.S. servers will be coming down at 7am PDT on Wednesday, May 30 for an update. The EU servers will come down at 5am London Time on Thursday, May 31. Here are the patch notes:
POPULATION / ZONE PROGRESSION
All Solo instances in Skyshrine are now a 90 minute lock out, same as heroic instances.
The achievements "Rallos' Chosen" and "Vindicator Soren's Demise" should now update for all members of the raid force that kills him regardless of range. This change should also be retroactive if you have ever defeated him and were not awarded the achievement.
Dozekar's Head is no longer lore.