There were reports at this morning's (my time) Kanium session of:
1. Guns failing to fire.
2. Some sort of terrain issues ("steps" appearing on roads).
I didn't experience either (I'm not saying they didn't happen) and hopefully there will be some follow up posts here.
The session was hosted in the US, and I suspect in terms of "hops" my client machine was equidistant to those (I think predominantly in Northern Europe) who did experience the issue(s).
Hoping that those who experienced the issues follow up with details either here or in their own dedicated posts.