The last time I saw it was in blunder. Bad news in that case. I haven't opened the wings file back up yet, but upon opening the tga in gimp, there was no background coloring on it. It's like I saved it with the alpha channel dominant somehow. Weird thing is, by default, gimp doesn't open a file with the alpha present. You must manually add it, or add a layer to get the alpha present.
Here's a shot of my settings. White, color background is what I'd expect to see in gimp. I created a new texture just to double check to see what Id get. As you can see, no background. Jeff, Ill check into your other suggestion just as soon as I can find what it was.
For that example, I used white simply to create my template with the faces outlined for for CS ease. I always hide the background in wings after I get my initial placement of parts to make it easier to see if any parts were missed. I never unhide after doing so.
Like I said before, it's not a big deal, just something I've never seen before in wings.