Tonight's update for Team Fortress 2 includes some new crates, the removal of some old crates, and the usual go at fixes and updates.

Changelog for Team Fortress 2 for December 6, 2013
- Added Crate #75, Crate #76, and Crate #77 to the drop list
- Removed Crate #57, Crate #59 and Crate #71 from the drop list
- Added new Strange parts that can be applied to Strange cosmetic items
- Fixed a client crash related to the Mann vs. Machine mission victory panel
- Fixed players being able to level-up some Strange items when playing on servers with only bots
- Fixed some cases where Halloween spell effects on items would not appear when they were supposed to
- Fixed robot Engineer head not looking correct for the Botkiller Sniper Rifle Mk.II
- Fixed killstreak notices being stuck on the screen when the map is changing levels
- Fixed Team Shine killstreak sheen effect not displaying properly for the Blue team
- Updated several backpack images to fix issues caused by mat_picmip
- Updated Killstreak Kits to work on Festive and Botkiller variants of target weapons

- Updated pl_upward
-- Fixed players getting stuck in the initial Red spawn room after control point 2 is capped
-- Improved bot navigation

- Updated cp_gorge
-- Improved bot navigation

- Updated Mann vs. Machine
-- Fixed players who join in the middle of a mission not receiving the Upgrade Refund credit if it has been earned by the team
-- Fixed Romevision hats conflicting with gatebot hats in Mannhattan
-- Fixed an exploit that allowed purchasing upgrades for weapons other than what they were intended for
-- Updated mvm_rottenburg
--- Fixed a bug where the bomb could get stuck out of reach in the corner near the cap
--- Fixed a bug where bots could be instantly killed by being pushed into the tank tunnel once opened
--- Fixed a bug where money could get stuck in the tank barricade when it was rebuilt, preventing collection
-- Updated mvm_mannhattan
--- Rebalanced Empire Escalation
--- Fixed credits not always being collected when they fall into the grinder
--- Fixed a bug that allowed the gates to be captured out of order
--- Fixed a lighting bug related to lower graphics settings that cause the map to be too dark