Double melee is fixed
Invisistabbing / disguisestabbing (done the same way as double melee) is fixed
Sniper Rifle quickswitching is fixed
Medic / Syringe Jumping is fixed
Skywalking on DB stage 1 cap 1 is fixed
Skwalking on DB Stage 3 cap 1 is fixed (we believe, not extensively tested)
Skywalking on DB Stage 3 cap 2 is fixed
Medic nerf allowing slower heal above 100% health
Dispenser heals players near it slower (Not completely sure)
Skywalking on GP Cap C we haven't tested yet
Face-Stabbing is not fixed, in addition Head-Stabbing (Stabbing someone while standing on them) is still enabled
No new maps (Duh)
Recent Demo/Soldier nerf is not added yet
Granary windows, DB extra alley staircase on Stage 3 cap 1, and extra left passage on DB stage 2 cap 1 are all still absent
Demo stickies and grenades falling through floor is still not fixed
10 player hosting and 14 player hosting enabled
Rough hosting restictions added (cant host a 16 player game if your connection wont allow it.)Auto Balence now takes place in 5 seconds, not 10
That's about it.
Thanks to a poster from the steam forums.