I was finishing up a quest as the revert to Patch 0.7.7D was released - still on E Patch - the quest with Forgotten Knight to begin Mastery Class selection was unable to be turned (the "!"s were silver, and the portal didn’t open).

The Patch Notes mentioned failsafes on Quests - I wasn’t sure if this was due to that, or 0.7.7D being re-released - so I wanted to let you guys know here just in case that was a 0.7.7E bug.