As the topic title suggests, I get them on cell transitions interior->exterior and exterior->interior both. The most frustrating part is that something also seems to corrupt my savegames and prevent them from loading. Most recent example:
Save, inside Arcadia's Cauldron.
Transition to Whiterun (Autosave)
Go up to Dragonsreach, Quicksave
Transition into Dragonsreach: CTD in the loading screen
Both the quicksave and the autosave CTD on the loading screen, so I have to go back to:
Arcadia's Cauldron
Transition to Whiterun (Autosave)
Go up to Dragonsreach, dungeon entrance, Quicksave
Transition into Dragonsreach Dungeon
Transition from Dungeon to Dragonsreach Proper: CTD in the loading screen
Again, all the saves except the first in Arcadia's Cauldron crash before loading.
My load order is as follows. I'm wondering if there are any obvious culprits I'm not aware of?
Spoiler
00 Skyrim.esm01 Update.esm02 Domus_Dementis.esm03 ApachiiHair.esm04 HighResTexturePack01.esp05 HighResTexturePack02.esp06 Thorald.esp07 Unofficial Skyrim Patch.esp [Version 1.0]08 Chesko_Frostfall.esp09 Better Dynamic Snow.esp0A Natural Skyrim Rain.esp0B Realistic Lighting.esp0C StaticMeshImprovementMod.esp0D dD - Enhanced Blood Main.esp0E Mart's Savegame DeBloatifier.esp [Version 1.4Beta]0F Cloaks.esp10 1nivWICCloaks.esp11 DragonBoneWeaponsComplete.esp12 RobedSteelPlateArmor.esp13 Smithing Perks Overhaul - Balanced.esp14 Weapons and Armor fixes.esp15 Weapons and Armor fixes - Hacks.esp16 Complete Crafting Overhaul.esp17 Domus Domentis.esp18 RayeksEnd.esp19 Lightweight Potions and Poisons.esp++ Ish's Item Name Lore Tweaks.esp++ HoodlessPsijicArchmageReplacement.esp1A BetterSwimming.esp1B UnreadBooksGlow.esp [Version 1.3]1C dD - Realistic Ragdoll Force - Realistic.esp1D Ish's Sensible Item Names.esp1E ScalingElementalRunes.esp1F ElementalRunesImpact100.esp20 SkyTEST-RealPredators&Animals.esp21 MidasSkyrim.esp22 WATER.esp [Version 1.3]23 tSSSSS.esp24 BetterMagic_FULL.esp25 InfiniteCharge.esp26 DeadlySpellImpacts.esp27 DeadlySpellImpacts - Two Fire.esp28 SMLeveledItemSmithing.esp29 Crafting300.esp2A ishCrafting300SMLeveledItemSmithingCompatibilityPatch.esp2B Better Followers - SBP.esp2C Better NPC - Faction Pack.esp2D BDO.esp2E AutoCastRacials.esp2F portal2mod.esp30 Bashed Patch, 0.esp31 Realistic Lighting Patcher.esp