Hi,

I had the same issue as mithrandir20 (screen looked all green no matter what resolution, etc) and managed to fix it by manually editing the config.div (NOT the .LCL) file as follows:
(do not run the config tool as it doesn't contain all of the options from this file and I found that will reset those ones):

// display width
width 1680

// display height
height 1050

// activate smooth mode
smooth 1

// show the intro movies
startup logo 1

// enable quickstart
quickstart "on"

// use compressed image lists
images compressed

// use flat file system
flat files

// enable/disable z-tunneling
ztunnel 1

// set the memory limit
memory limit 32

// enable/disable the use of bitmapped fonts
use8bitfont 1

// disables fog rendering
no fog

// set the color mode
rgb 565

// Select alpha bit
Alpha bit 0

What seems to have made the real difference for me was setting color mode to rgb 565 from 555, now honestly it could be just a fluke but as I recall that pretty much fixed the issue. Just my 2c, hopefully that will help someone else!