Sorry. It’s not directly related to a WPClone issue. In fact Free PHP level 5.3.1.RC4 apparently has a bug supporting Heredoc and two WPClone backup functions make use of:
echo >>>EOT
…
EOT;
resulting in syntax error. Changing those lines to individual echo statements temparily resolve the issue. However WPclone is advertised as supporting WP 3.0+ and I did not find a mention of this PHP bug.
I would have found the problem earlier if line numbers mentioned in tthe PHP error messages would be correct, bu I could not manage to get correct numbers even if deleting blank source lines and useless comments.