I've changed the numbers like you mentioned and tried few other numbers though out the .scr for the snow, but sadly it didn't work.
I haven't messed...
This does work, but it did not solve my problem.
I have a linux instance, I open a server MOHAA works perfect, I open the second server after 4 or 5...
Not at my PC so can't check myself. I notice you have length set as 2, so maybe the beam fx is extending the length of the brushes. Perhaps lower it...