Map Edit Problem

[Thorn]

I can create, edit and save a map just fine. But if I load a map I was working on and try to add another land tile all of the other tiles that I had created before disappear! Is this a know problem or another Windows Vista bonus feature?

 

[Thorn]

I found this at that other Civ site:

Do not start with a blank map when making a custom map; always start with a randomly generated map and then edit it. The map elevations are messed up when starting with a blank map, one result being that placing the first river (or popping one in a Unity pod) causes much of the land to sink below the ocean.

That was the problem. I was starting with a blank map. Bad me!