Post-[resolved] a value of "wp_users" is empty (in 14 posts), Daniel released beta.
About the beta, the hierarchy of the folder seems to be strange if I defrost .tar.gz file of the file backup.
There is no "wp_includes" folder.
A folder of the dozen including some plugins(contact-form-7,nextgen-gallery,etc) is made at the hierarchy same as "wp_admin" and "wp_content".
I didn't have special wp_content_dir set.
I only excluded "cache" and "upgrade".