Sorry, unable to reproduce... Looks like extremely complicated issue.
Ok, damn.. perhaps you r those lucky ones who dont have MAFs. I have seen them lot lately because have been doing new world map and spend lot of time WB.
Cant say nothing new about MAFs, I have done lots rivers but that have propably nothing to do with MAFs. I have suspected earlier that graphic paging is related and I still do think so..
Btw, if some one is intrested I can soon upload my new world map soon. Its modified Rhyes huge world. Just for fun I made it so that 85 worlds biggest rivers r so exact place as they can be in civ4 and they all r in correct order by lenght
These r rivers in map..first number is rivers max lenght in tiles and number in colums is river system total lenght in tiles.
1.Nile 21 (34)
2.Amazon 21 (67)
3.Yangtze 20 (26)
4.Mississippi-Missouri 20 (52)
5.Yenisei 19 (43)
6.Yellow River 18 (19)
7.Ob-Irtysh 18 (40)
8.Parana 17 (37)
9.Congo 17 (41)
10.Amur 16 (23)
11.Lena 16 (39)
12.Mekong 15 (17)
13.Mackenzie-Peace-Slave 15 (18)
14.Niger 15 (21)
15.Brahmaputra 14 (15)
16.Murray 14 (21)
17.Tocantis-Araguaia 14 (20)
18.Volga 14 (32)
19.Indus 13 (20)
20.Euphrates 13
21.Madeira (Amazon) 12 (17)
22.Yukon 12 (19)
23.Sao Francisco 11
24.Ganges 11 (23)
25.Syr Darya 11
26.Salween 11
27.St. Lawrence 11 (14)
28.Rio Grande 11 (12)
29.Lower Tunguska (Yenisei) 11
30.Danube 11 (14)
31.Ob (Ob-Irtysh) 10 (13)
32.Zambezi 10 (14)
33.Vilyuy (Lena) 9 (11)
34.Amu Darya 9
35.Nelson-Saskatchewan 9 (11)
36.Paraguay (Parana) 9 (14)
37.Kolyma 8 (11)
38.Ural 8
39.Arkansas (Mississippi-Missouri) 8 (12)
40.Colorado 8 (11)
41.Olenyok 8
42.Dnieper 8
43.Aldan (Lena) 7 (10)
44.Ubangi (Congo) 7 (12)
45.Rio Negro (Amazon) 7 (9)
46.Columbia 7 (10)
47.Pearl river 7 (8)
48.Kasai (Congo) 7 (9)
49.Ohio (Mississippi-Missouri) 7 (9)
50.Orinoco 7 (19)
51.Tocantis (Tocantis-Araguaia) 6
52.Xingu (Amazon) 6
53.Mississippi (Mississippi-Missouri) 6 (8)
54.Orange River 6 (9)
55.Tigris 6 (9)
56,Songhua (Amur) 6
57.Tapajós (Amazon) 6 (7)
58.Don 6
59.Stony Tunguska (Yenisei) 6
60.Pechora 6 (9)
61.Kama (Volga) 6 (11)
62.Limpopo 6
63.Indigirka 6
64.Churchill 6
65.Khatanga-Popigay 6 (8)
66.Desaguadero 6
67.Northern Divina 6 (10)
68.Rhine 6
69.Pilcomayo (Paraguay) 5
70.Blue Nile (Nile) 5
71.Okavango 5 (6)
72.Volta 5 (2)
73.Tobol (Ob-Irtysh) 5
74.Oka (Volga) 5 (6)
75.Chenab River (Indus) 5 (7)
76.Godavari 5 (6)
77.Benue (Niger) 5
78.Krishna 5 (6)
79.Fraser 5
80.Athabasca 5
81.Vistula 5 (7)
82.Elbe 5
83.Daugava 5
84.Selenga 5 (7)
85.Loire 5
86.Tagus 5
87.Yana 5
88.Purus (Amazon) 7 (9)