[versatile_bfg]

Get the latest snapshot from the stable branch for metamod and sourcemod [if you are using sourcemod]
http://www.metamodsource.net/snapshots - current latest is - 1.10.6-git940
http://www.sourcemod.net/snapshots.php - current latest is - 1.7.3-git5209

Once you have extracted these to the server then update the server one more time and see if the issue still happens.