in db.c the load_continent section:
value = get_continent( fread_string(fp) );
pointer = fread_string_nohash( fp);
value = get_continent( pointer);
or some similar variation.
Otherwise this string is:
A) Being allocated and never disposed of
B) Being added to the hash table with no way to remove it.
I didn't see this one reported yet so thought I'd share.