I seem to be having the same problem that other people have already reported. The Duplicator 0.5.2 plugin worked great and really saved me a lot of time over the past few weeks. But today I tried to move a site to a new server and I get hundreds of database errors, all like the following:
**ERROR** database error write 'Duplicate entry '' for key 'option_name'' - [sql=INSERT INTO wp_options VALUES("", "", "", "")...]
We are running Wordpress 3.9, but I honestly can't say whether this is the first time we tried using Duplicator on 3.9.
There was a suggestion to download the developer 0.5.3 version, but I can't find that anywhere.
Can someone confirm that 0.5.3 will fix this problem, and provide a link to download that version?