TL;DR: This is a coldfix (hotfixes are for servers, plus its a space game!) for a projectile trails visual bug that sneaked into the 1.0 release.
For the enquiring minds, some of you may have noticed projectile trails jittering slightly due to small velocity discrepancies per frame. The burden of having rigid bodies and non-rigid bodies playing together. This issue was introduced due to a last minute change in the 1.0 release, after untying physics updates from frame rate, and took while to resolve it. Hence, 2 patches in 2 days :)
As a side note using your graphics card utility software to maintain a stable frame will provide the best experience, if one cannot be achieved through the games Vsync options.