set_preference("default_header_charset", NewStrBufPlain(bstr("default_header_charset"), -1), 0);
set_preference("emptyfloors", NewStrBufPlain(bstr("emptyfloors"), -1), 0);
set_preference("default_header_charset", NewStrBufPlain(bstr("default_header_charset"), -1), 0);
set_preference("emptyfloors", NewStrBufPlain(bstr("emptyfloors"), -1), 0);