I tested this on a clean 1.0 install.
Here is the code straight from Runebook.cs:
Code:
public RunebookEntry( Point3D loc, Map map, string desc, BaseHouse house )
{
m_Location = loc;
m_Map = map;
m_Description = desc;
m_House = house;
}
What do you have for RunebookEntry in your Runebook.cs script? Are you using a custom version?