I'm getting the same issues - it's happened about 4 or 5 times to me now. I'm guessing that since the download is taking so long, the account is getting logged out due to inactivity which kills the download? Here's a screenshot of the error from my download manager: imgur: the simple image sharer
Makes using the VM impossible for a lot of us. And I've chewed up nearly 10% of my ISP download quota just trying to get this VM working. Pretty disappointed..