I took a screenshot, showing the cursor displaying the little grasping hand indicating that you can execute an action on the selected item:
Sure enough, right after this screenshot, I was able to take the Beacon of Light, and the altar did its little animation of closing down afterward, but that was all. There was no checkpoint message, no quest update message, and it didn't seem to affect anything else. And the blue globe in the Warrior's Rest was not present at all.
- Inferno Act 1
- MPower set to 5
- Quest set to The Imprisoned Angel
- Solo game
- Patch version 1.05