Is it possible that one of the early RC versions got out somehow and is getting distributed without your knowledge?
Just an idea.
I didn't think of that.
I believe the KDE CE did, not sure about the Fluxbox CE.
If it's an RC and the live cd has the incorrect md5sum then it can't download the iso.
None of the RCs are made to download the iso's.
All RCs have tested the mint4win install before releasing as an RC.
I have installed all RCs through mint4win with no problems, as did exploder, the developer of the CE and clem.
All RCs can only have mint4win create the iso from the Live cd from the cdrom drive.