I revalidated the server files yesterday. That might help, i was experincing some drops myself and now they seem fixed. Otherwise nothing has been changed on the server end for quite a while other than the snapping tool. The towns use a lot of textures and really load your video memory. I also hear that when you lower the settings on arma below a certain point, it shifts more of the load from your vid card to the cpu and that might not be best for performance.