We experienced a pretty weird problem -- in multi-player (IPX) we kept getting one or another computer crashing to desktop. Trouble is nothing was very replicable. Reboot all machines, reload from the last save and it would usually go on. Usually but not always. One that kept cropping up was shortly after disabling the first trap on the 3rd level of the mines (next to Joseph's ring). Didn't seem to matter what path was taken, or whether bardsong was going, or trap detect, but one of the machines would crash within about 45 seconds.
We uninstalled the module, started a new game, followed pretty much the same path, this time it did not crash.
We reinstalled UB, started a new game, this time the fairly repeatable crashes started about halfway through Nashkel Mines, Level 3, not the same place as before, so far as I can tell.
Single player it works fine. Multi seems to have problems.
Basic TotSC, with BGTotSC-Patch-n-FixPack.EXE,
// Log of Currently Installed WeiDU Mods
// The top of the file is the 'oldest' mod
// ~TP2_File~ #language_number #component_number // [Subcomponent Name -> ] Component Name
~VAULT/SETUP-VAULT.TP2~ #0 #0 // Vault Item Pack v5.01 (BG: TotSC)
~VAULT/SETUP-VAULT.TP2~ #0 #1 // Max HP on Level Up (BG: TotSC)
~BIGSTACK/BIGSTACK.TP2~ #0 #0 // Big Stacks 1.1
~EXTRAS/EXTRAS.TP2~ #0 #0 // Extra & Enhanced Encounters v 2.2
Bigstacks is what you'd expect -- gems, potions, missiles, etc, have higher stack limits.
Extras is my own, but I didn't see anything obvious that should have been a problem. I'm not doing anything in the mines (though IIRC Vault does.) Maybe I'll try UB with nothing extra at all, I don't know.