GIMP Cubemap Problem...

[Statyk]

So following Your Computer's GIMP .dds cubemap export tutorial (as I never use GIMP myself), I ran into a bit of a problem... Upon export, the image comes out looking like this:

Spoiler below!

But to give you an idea of what it's SUPPOSED to look like, here's a full image of the cubemap slides. (NOTE: In GIMP, they are stacked just as described in YC's tutorial video )

Spoiler below!

Any ideas? I do most of my cubemap editing in Photoshop with the Nvidia plugin, but when exporting with DXT1 compression, the quality gets diminished. While it's not noticeable as much in daytime skyboxes that I've done, it's pretty noticable in a night time skybox, so I figured perhaps GIMP will provide better quality exports.

Thanks guys.