I wouldn't think it would be that tough a fix, in theory. I mean, I'm definitely not a computer programmer, but since the problem didn't exist in earlier versions of iTunes, it's obviously something about the new version that's causing the problem, right? Since it only happens with iTunes and no other program I use, including other media programs, I doubt it's a problem with some third-party application interfering with iTunes in some way.
I've gotten used to using Alt+Tab to switch windows, but it can be a pain when I only have my right hand and can't reach the tab key easily. It would be really nice to be able to change windows in those situations without minimizing iTunes! Please, can you fix this?