Looks like a client update went out this morning.
http://battlelog.battlefield.com/bf4/forum/threadview/2955065217944685108/
1) Reduce the number of crashes
We believe this update will solve a large portion of the most commonly occuring game crashes, and the improvement in overall stability should make a big difference for many players.
2) Eliminate a network sync bug
If you’ve been experiencing situations in multiplayer where it appears that you are taking damage from enemies through walls, you might have been the victim of a network sync bug. In this game update, we have identified and eliminated one such bug that caused this type of gameplay experience. We are continuing to work on more multiplayer optimizations concerning network performance.
3) Improve Network Smoothing
We have made some improvements to the ”Network Smoothing” functionality that you can find in the OPTIONS>GAMEPLAY menu. The Network Smoothing slider governs a group of settings that aim to produce a tighter multiplayer experience based on your specific packet loss situation.
If you’ve been experimenting with the Network Smoothing slider earlier, it might now yield better results. If you haven’t tried it before, please explore this setting and set it to the lowest value you can without experiencing graphical glitches in the game. By setting it lower, you can get a tighter multiplayer experience, depending on your specific network situation.
More details upcoming
Besides the above mentioned focus areas, this PC game update contains a number of other fixes and tweaks that we will detail once it’s live.