Tracked it down
This was a reply to another thread. But I hit the wrong button for some reason.

http://forums.winamp.com/newreply.ph...hreadid=207213

Is the original thread...

I suppose I should respond. Thanks Kichik for this debug version. It turns out it wasn't needed. We figured out what was causing the error.

http://forums.winamp.com/showthread....rd+drive+space

Our 170MB installer was too much for their little old C drives.

We plan on both investigating a non-solid state installer, and or including this check: http://forums.winamp.com/showthread....eck+disk+space

Any other ideas/suggestions?