Rod,
Yes, I wouldn't be surprised if some corruption has crept into the files either in the ftp process or to do with something else at their end. Either way, ask them if there is a way to untar/unzip files from the server, it should make the process much more stable.
Tim.
PS I recommend "Filezilla" as a good FTP client.
Installing and upgrading help
While upgrading to newest version, I get a blank page after entering information for database
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