For example, walking into a cantina to find that there is no floor, walls or ceiling, wandering around for about 30 seconds, and then the game crashes. The few times this has happened it was preceded by entering a new area or loading a menu and finding missing textures and images. Rarely, it will crash during normal gameplay when I'm not saving or loading.
It has also happened a few times when I attempt to quick save, with the result that my quick save is corrupted and I have to load a backup. Usually this happens during load screens transitioning from one area to another.
KOTOR 2 keeps crashing to desktop with the message swkotor has encountered a problem and needs to close.