If you see the following error with "Following files have not been uploaded correctly" during an installation or update it means that some files have not been uploaded correctly. You are presented with a list of missing and corrupted files which should be re-uploaded and then you can restart the integrity check. Make sure that you are uploading the files in binary mode via FTP.
If you have intentionally changed some files and you want to skip the integrity check, then access the installation with parameter p=F like ..../install/index.php?p=F