Ok, so if I fast travel to a place, enter or exit a cell, etc. all the npc's will be in their correct places for a couple of seconds and then they will instantly vanish and re-spawn somewhere else. For example, if I travel to Whiterun, all the guards will be at their posts like normal, but a couple seconds later they will all vanish and then reappear in seemingly random places elsewhere. Or when I travel to a fort to do a civil war quest, all the soldiers will be standing nicely together and then suddenly all vanish and re-appear in random spots, dispersed. This is extremely weird and happens every time I fast travel or enter/exit a door. It only happens to npc's that respawn, never to named npc's or followers. It started happening after cleaning my save (but I didn't really notice until it was too late to go back to an earlier save.) Also, upon fast traveling (long after the first bug showed up, probably unrelated), my player obtained a strange, permanent, and extremely annoying icy cloud around him similar to that of ice wraiths. I've found this page: http://forums.nexusmods.com/index.php?/topic/872861-tutorial-removing-unwanted-magic-effects-from-the-player/ but nothing on it helps. It's not caused by magic effects and using the console commands and shader id's listed in that article doesn't do anything. Attached is a screenshot of this strange "ice cloud" effect, I hope it clearly shows the problem.