Can't see some NPC's

[Chrushev]

That is really strange. Do you have the game installed in Program Files? or just on C: ?

Have you tried reinstalling?

What about restarting PC when it happens to see if it goes away after restart?

Duxa's Installer wouldnt cause this, but have you installed/modified the game in any other way? Better textures or anything?

Have you updated the video card drivers/if they are the latest try reverting to an older version? What video card do you have?

What about reinstalling?