Problem with admin backup and files with percentage characters

[edvanleeuwen]

I am trying to backup a complete user branch by using the admin backup. In it are (temporary) files of CivCRM which include percentage signs. The backup process seems to choke on this.

Error Compressing the backup file user.xxx.yyy.tar.gz : /bin/tar: domains/xxx/public_html/sites/default/files/civicrm/templates_c/nl_NL/%%25: Cannot open: Permission denied
/bin/tar: domains/xxx/public_html/sites/default/files/civicrm/templates_c/nl_NL/%%D0: Cannot open: Permission denied
/bin/tar: domains/xxx/public_html/sites/default/files/civicrm/templates_c/nl_NL/%%88: Cannot open: Permission denied
/bin/tar: domains/xxx/public_html/sites/default/files/civicrm/templates_c/nl_NL/%%49/496: Cannot open: Permission denied
/bin/tar: Exiting with failure status due to previous errors

Is there a way to prevent this?