no errors on shutdown. i found the offending item, but still don't know what about it caused the segfault:
Item
{
Name a noble's shield
Serial 0x4700c7ca
ObjType 0x1bc4
Graphic 0x1bc5
X 0
Y 0
Z 0
Revision 4
Realm britannia_alt
CProp ItemMod a1:a4:S3:dexi2i0S5:item,
CProp PublicDescription a4:S49:Thick steel encrusted with gold and diamonds,thisS42:shield is perfectly balanced and seeminglyS52:indestructable. So fine is its balance its nearly noS27:hinderance at all to wield.
CProp a_equipped i13917075
Layer 2
Container 0xd45b93
EquipScript :statmod:equipmod
UnequipScript :statmod:unequipmod
Quality 1
HP 280
maxhp_mod 140
}