ATTENTION EVERYONE!
Go to your sensitivity in-game and you will see a couple of options: Mouse smoothing (on/off), and a mouse smoothing amount (if on) this has a part of what is going on.
I have also noticed that the regular sensitivity has been reduced by half. I used to use a sensitivity of 13.5, but now I’m using 31.5, and my mouse still moves slower than it used to.
Stop spouting bullshit, UE3 doesn’t suddenly change how the mouse senstivity works.
I have 144Hz monitor, of course. 
I’ve never heard FPS above 180 messes with UE before SD stated it. I’ve been playing fps games for 20 years. Although I am willing to trust SD on this, I believe this issues roots somewhere else. How many UE3 games have you played ? I played a lot of them.
As far as fps above your screen frequency are concerned, I am sick of this discussion.
Play a game @60 fps on a 60hz screen, and then play it @120 fps on the same screen and judge by yourself.
The only reason you want to cap your FPS is to stabilize them, not because they are pointless. I caped my FPS on Call of Duty 2 (back in 2003) @125 fps so I could do some trick jumps impossible to do @ 90. I had a 60hz monitor back then. How were the extra 65 fps pointless ?
One last thing: I started playing DB on a 60hz screen and lower specs. I could hit around 90fps. I upgraded the screen to a 144hz one before upgrading any other hardware (kept same CPU and GPU). Though I would still hit the same FPS, my accuracy improved instantly.
What sandstormMosaic said…
I got the run of the mill 144Hz (vert refresh rate) monitor and capped my fps at 144fps via AMD Crimson driver; but still, I use the STAT FPS in game as baseline benchmark for reporting frame rate issues. I know it’s faulty, but what else can I use? I mean, the game reports 190~216fps previously (a few updates ago around August) but what else can I use to get it across SD? at 90fps using the in game benchmark, the display is approximately 60 fps which is a tad laggy for my eye (but still playable). Then I get to as low as 0.4fps for some weird reason.
I’m not saying that you shouldn’t play with higher than your refresh rate but it tends to be that there is not alot reason to go above a stable 180 fps at least in games like db. unless your playing games on quake /source/ id tech etc engines because in those sort of game its necessary for trick jumps and bhops etc.
also I agree with you that having a high refresh rate even if the frame rate doesn’t match it helps with aim.
Same. Can’t hit shit after this new patch so I’m just wating for some new fps game to arrive that fills this disappointment.
Something feels way off about aiming ingame now. I struggle to believe this passed testing.
Nothing changed for me, but that’s because I don’t really aim. 
Hadn’t noticed anything after the MOFO update, but after today’s update sometimes my frames drop a bit and when that happens the mouse input just dies for a bit, don’t know what’s up.
I tried all sorts of things but I just can’t hit and track targets as consistently as before. I don’t know why, I’m not some sort of aim god but I do have a modest 32% accuracy or so (maybe it’s more, I don’t really check).
Day 1 of the patch I couldnt hit a broad side of a barn, only now has my aim returned to its former “not as potato as most” glory.
After more games played, I’ve experienced some mouse unresponsiveness and i don’t think it came from my arm. Sometimes, my crosshair just don’t want to move as i want, as if the mouse sensitivity become suddenly near 1, and the second after it came back to normal.
Since I can’t edit my post, just a little update. Not sure if it will stay like it but yesterday evening I play a few games and it felt great, was doing really good.
I had a few moments of “how the hell could I have missed him/her so many times in a row” when before the update my boomstick was a mighty instrument of terror.
My vote probably doesn’t count much because I upgraded to a new keyboard/mouse/larger mousepad the day the update was released 
All the same, I have definitely improved…
I seemed to be able to get on top of it relatively quickly, it’s the massive stutters that keep throwing me off. Stuttered a molotov right up my own butt last night, and that wasn’t as hot as it sounds
got a new PC so my aim def improved with high fps.
i do see the input lag some people mention though, esp. during a ping spike, feels like the game takes over mouse control