Have I searched the forum before posting? yes
Have I read the Troubleshooting Wizard before posting? yes
Have I read the documentation before posting? yes
Joomla! version: 1.5.23
PHP version: (unknown)
MySQL version: (unknown)
Host: (private server Ubuntu 10.04 LTS)
Akeeba Backup Professional version: (latest)
jpa extracts locally on MAMP but gives "Invalid header in archive file, part 0, offset 23571" on remote server
the md5 on the local and remote servers are identical
have read https://www.akeebabackup.com/documentation/troubleshooter/kscantextract.html
the root of your to-be-restored website was already set to 0777
unable to use ftp mode as ftp not enabled on the server