In v3.0_rc6, there's a file naming issue when a user chooses to both encrypt backups and save the latest copy in a separate directory. cp fails with the warning "cannot stat dump.sql.gz.gz.enc". This can be fixed by changing line 307 of automysqlbackup from...
cp -al "${1}${suffix}.enc" "${CONFIG_backup_dir}"/latest/
...to...
cp -al "${1}.enc" "${CONFIG_backup_dir}"/latest/
Hope this helps!
Of course it helps! Thank you for your help! I will fix it in the next rc version. Probably tomorrow.