I've also the same problem before some weeks ago. I don't know how to solve it. But I know why the problem appears,here:

video_mode=8; // 1024*768
bmap Example_B=<Example.tga>,0,0,4,16;//init
panel Example_P
{
bmap = Example_B;
layer=1;
}

// in a function
Example_P.scale_y = 16; // possible, because: 16/16=1;
Example_P.scale_y = 32; // not possible, because: 32/16=2;

! Above the value one it isn't possible.

in your game:
Picture=1*256; Scale_X=1024;
1024/1=1024; // not possible(1024pixel not shown)

Picture=2*256; Scale_X=512;
512/2=256; // not possible(256pixel not shown)

Picture=16*256; Scale_X=64;
64/16=4; // not possible(4pixel not shown)

Maybe this is wrong, don't know. I found no solution.

Regards,
beegee

--------------------------
GenuineMotors.de