Occured only after 1.26.
Both servers were running fine initially.
The crash only occured after the server was up for a certain time.
Exception code: C00000FD STACK_OVERFLOW at 092664ED
Exception code: C0000005 ACCESS_VIOLATION at 0B0264E0
"arma3server_2014-08-22_07-04-59" was empty and crashed seconds after spawning in with my player unit.
I think the same happened to the other server, though I am not 100% sure, as I was not on there myself at the time of the crash.