A post on the Natural Selection 2 website has an answer from developer Unknown Worlds to the musical question "Where are my bugfixes!?" (thanks Ant). They admit that while most NS2 players are not having issues since the latest update to their action/strategy sequel, some are experiencing a variety of problems to the extent they say: "It’s the wild west out there." Word is:

This is not the first time UWE has released a build that is not perfect, but we always come good in the end. That’s what we are working to do right now. Build 256 is under construction, and it exists solely to sort out the performance, input lag, crashes and bugs that are hurting you in Reinforced. Build 256 put in a good show during playtesting last night. Apart from Exosuits appearing as female marines, it was generally well sorted.

It will probably arrive on Steam next Thursday. We know that is too long, and it much longer than we want it to be. Unfortunately we can’t push harder. Many members of the team took a few scheduled days off after Reinforced, to recover from lack of sleep, lack of family and an overload of coding. That means 256 has been a little slower out of the gate than we would like. But it is on its way.

In the 26 updates we have made since launch (An average of one every two weeks) we have never left you hanging when we have reached too far and fast – We are not about to start now.