Invisi-Meshes.

It doesn't matter what mutator I use - Berserk, RajArena2, RPGStats, LastStand (PropsMutator), they all have invisible object glitch.

[Engine.GameEngine]
CacheSizeMegs=256
UseSound=True
ServerPackages=RajMutators2
ServerPackages=Berserk
ServerPackages=M16
ServerPackages=Gold
ServerPackages=Vuvuzela
ServerPackages=NABGrapple
ServerPackages=CitrusBazooka
ServerPackages=BlasterPack
ServerPackages=NerfKids
ServerPackages=Critical
ServerPackages=WarBots
ServerPackages=HuntBots
ServerPackages=RaceBots
ServerPackages=Vox
ServerPackages=SNOWPACK
ServerPackages=Berserk
ServerPackages=CitrusBazooka
ServerPackages=Critical
ServerPackages=Easter
ServerPackages=FoodFight
ServerPackages=Gold
ServerPackages=NABGrapple
ServerPackages=BlasterPack
ServerPackages=CrystalPack
ServerPackages=M16
ServerPackages=PaintBlast
ServerPackages=RajMutators2
ServerPackages=LastStand
ServerPackages=RocketsNAB
ServerPackages=RPGStats
ServerPackages=TeleGun
ServerPackages=NABTranslocator
ServerPackages=VirtualReality
ServerPackages=WackyWeaps
ServerActors=IpDrv.UdpBeacon
ServerActors=IpServer.UdpServerQuery
ServerActors=IpServer.UdpServerUplink MasterServerAddress=master.333networks.com MasterServerPort=27900
ServerActors=IpServer.UdpServerUplink MasterServerAddress=noccer.333networks.com MasterServerPort=27900

I'm not sure if it matters, but try putting them in this order:

[Engine.GameEngine]
CacheSizeMegs=256
UseSound=True
ServerActors=IpDrv.UdpBeacon
ServerActors=IpServer.UdpServerQuery
ServerActors=IpServer.UdpServerUplink MasterServerAddress=master.oldunreal.com MasterServerPort=27900
ServerActors=IpServer.UdpServerUplink MasterServerAddress=master.333networks.com MasterServerPort=27900
ServerPackages=NerfKids
ServerPackages=WarBots
ServerPackages=HuntBots
ServerPackages=RaceBots
ServerPackages=Vox

Then after that put your custom Serverpackages

However, here is a thought... try copying your Nerf.ini file to the following directory:

C:\Users\<YOUR USER NAME>\AppData\Local\VirtualStore\Program Files\Atari\Nerf\System

It is possible it's reading from this directory instead of the default one.

No more invisible objects, but now I am getting "Ran out of virtual memory" error way too frequently (after 5-15 min). Sometimes, it even happens when server starts.

Okay so there's this help article on the subject (that you've probably already read):

www.nerfarena.net/index.php/help/9-nerf-...y-in-nerf-arenablast

You might try increasing that to 1024 (1 gig), though if you have no room on your HDD this could be an issue too. Make sure there's no Nerf processes running (leftover from other crashes or servers) with task manager as well. If all else fails, restart your pc and try again. This should reclaim more memory for NAB to use. Just remember to make those ini changes to both instances of the Nerf.ini (just for safety sake).

I already did all that, this happens with every install of NAB 1.2 I get, no matter what computer. I could increase the cache size to 524288 MB if I wanted to, but it doesn't seem to make any difference.

In my modified version of NAB, I remember my log getting spammed by Accessed None messages (mainly from RPGStats) to the point where the log would be gigabytes large and unopenable after a mere 10-15 minutes of gameplay. I'm not sure if this was because of the modifications (I don't think I messed with RPGStats), and I'm not sure if this has something to do with the virtual memory.

However, the log file for this unmodified install seems to be missing?

The log file is going to be in the location you found the other Ini:

C:\Users\<YOUR USER NAME>\AppData\Local\VirtualStore\Program Files\Atari\Nerf\System

Look there and you might be able to determine a cause.

You might just have too many serverpackages. Remember, it essentially has to pre-load all of those each time the server changes maps.