I don't think I've changed anything, but when I'm outside and try to reload a game (as in when I die etc) the game locks up. I'm running the following mods for what its worth.
Fallout3.esm
PointLookout.esm
Anchorage.esm
ThePitt.esm
BrokenSteel.esm
Zeta.esm
CALIBR.esm
FOOK2 - Main.esm
FOOK2 - [[censored]] World And Neighbourhood Kit.esm
FOOK2 - [DIK] DLC Improvement Kit.esm
FOOK2 - Main.esp
FOOK2 - [EVE] Energy Visuals Enhanced.esp
FOOK2 - [DIK] DLC Improvement Kit.esp
MyFOOK2 - Black & White Tranquility Lane.esp
FOOK2 - Mothership Zeta.esp
WeaponModKits.esp
WeaponModKits - FOOK.esp
WeaponModKits - OperationAnchorage.esp
WeaponModKits - ThePitt.esp
WeaponModKits - BrokenSteel.esp
WeaponModKits - PointLookout.esp
MissingUniqueWeapons-Enhanced.esp
MissingUniqueArmorClothing-Enhanced.esp
MissingUniqueArmorClothing-Enhanced-NSF.esp
enhancedsnipersandsilent.esp
WMKAA12Shotgun.esp

Total active plugins: 26
Total plugins: 32