Update:
Bungie has said that this update is designed to fix some issues ahead of Rise of Iron on September 20.
2.3.1 is also the last scheduled update for PS3 and Xbox 360, “excluding emergency fixes for future game-breaking issues.”
Check out the patch notes below.
Original Story:
At 10am PT/1pm ET today, Bungie released Destiny update 2.3.1 on PlayStation 4, PlayStation 3, Xbox One, and Xbox 360. You’ll be required to log in to Destiny again after returning to the title screen to install the patch.
Although you shouldn’t be removed from any activities you’re currently in, once 2pm PT/5pm ET rolls around, anyone still logged in who hasn’t updated to version 2.3.1 will receive a a WEASEL error code, logging you out. After installing the update, you’ll be able to log back in and play as normal. According to reports, 2.3.1 is a 92MB – 105MB download, depending on your console.
When the patch notes are live, we’ll place them below:

Classes

Fixed an issue where Solar-based Damage-Over-Time (DoT) effects were dealing half their intended damage
Fixed an issue where the Intellect stat was not generating the correct amount of Super energy
Fixed an issue where selecting the Electrostatic Mind perk removed the Super regeneration provided by the Intellect stat

Armor
Exotics

Fixed an issue that prevented the Apotheosis Veil helmet from being accessible in the Exotic Armor Blueprints kiosk

Activities

Fixed an issue that could ...