There are two new patchs but the new patch, Feb 24 and Feb 25, is for the Scout. New weapons, Achievements, game mode "Arena", and maps.

New features

Added The Force-A-Nature, The Sandman, and Bonk!

Added 35 new Scout achievements

Added crit boosted on/off sound effects

Added new sounds for upgraded teleporters

Added new sound for a fully charged medic dying

Add bonus points section to scores

Scouts earn a bonus point for killing Medics who are actively healing a target

Added several new speech concepts, mostly hooked up to new Scout lines

Added new "Remember last weapon between lives" option to the Multiplayer Advanced dialog

Spies can now control which weapon the enemy team sees them holding. Hitting the "last disguise" key while disguised updates the disguise to show the Spy's currently held weapon

Added several new Arena mode announcer speech events.

Added "First Blood" to Arena mode

Removed 2x item respawn times in arena

Changed backstab handling to fix facestabs

Spies disguised as enemy team can now see player IDs for enemies


New maps

Added community maps: cp_egypt, arena_watchtower, and cp_junction

Updated cp_fastlane with Arttu's new version


Mapmaker requests

Added new input for forward speed modifier to FuncTrainTrain

Added TeleportToPathTrack input to func_tracktrain


Bugfixes

Fixed a bug where players would sometimes gib from non-gib damage kills

Fixed stat screen showing an entry for a class called "map."

Fixed item model panels not using team skins