Hello there. I'm looking through your code, and I've spotted this weird thing:

in g_local.h, level_locals_t defines:
int         numteamVotingClients[2];// set by CalculateRanks

It is used in g_main, CalculateRanks:
...
for ( i = 0; i < TEAM_NUM_TEAMS; i++ ) {
    level.numteamVotingClients[i] = 0;
}
...

team_t is defined like this:
typedef enum {
    TEAM_FREE,
    TEAM_RED,
    TEAM_BLUE,
    TEAM_SPECTATOR,

    TEAM_NUM_TEAMS
} team_t;

TEAM_NUM_TEAMS is 4, so the loop in CalculatRanks overflows.

Cheers,
Mads Lind