I'm having exactly the same issue as royebatty, disappearing bows. I've located it down to faulting when I enter a dungeon in Solstein. Outside, all is fine (and I've sorted, cleaned, Bashed the mods, then cleaned the save w/Savetool). Everything is fine UNTIL I go inside Ashfall citidel, or any other dungeon and my bow disappears. If I equip another, it goes too. I think this whole deal started when I installed the Equping Overhaul mod, but I've uninstalled, stopped the quest via the console, and cleaned the save from the orphaned scripts... yet... same issue. I've been thinking of pressing on as a non-bow weilding character because it ONLY affects bows. The reason why I think Equip Overhaul broke the savegame somehow is that I only used it a few times and couldn't find my dropped bow. I used the "power" to search for objects, but when the bow spawned in front of me and I picked it up it didn't go into my inventory. That's either the origin of this or just my imagination.