in essence, correct, but the way i'm using 'holding' and supporting are as two different things. What I'm trying to say is that to the best of my knowledge, when you upload a texture to TB, it coverts it to .tga, regardless or original format. But for some reason, when you 'convert' .tga to .tga, it drops the transparency... which I beleive may be his issue.
Not verified... just speculation from my own texture issues.