Comment 5 for bug 610820

@Noel J. Bergman
You are referring to a completely different bug. The bug you were talking about (which I also saw) was where the download size was always only 1kb in the main window.

The one that this bug is filed against is for when the download size appears to be correct at first, but then a different size is used in the downloading dialog. See:
http://ubuntuforums.org/showthread.php?t=1561222