More WotLK Classic hotfixes arrive.

October 20 (Source)

Wrath of the Lich King Classic

Classes

The effects of the Rogue Overpower talent are now cancelled upon activating another talent specialization.

Dungeons and Raids

Naxxramas

Death Knight NPCs can no longer cast Unholy Frenzy on raid bosses.

The Culling of Stratholme

Fixed an issue with Chrono-Lord Epoch’s Time Step. He will now properly move around the room as he targets different players, including those he started in melee range with.

Hide/Show Helm and Cloak options now behave properly when transformed in the dungeon.

Items and Rewards

Elixir of Distilled Wisdom now properly benefits from Mixology.

Drums of Speed will now provide the Tinnitus effect to the players affected by the item, similar to Greater Drums of Speed.