I'm surprised no one reported issue when using the latest version (1.9.1 beta v6).
Code:
Database error in vBulletin 3.8.3:
Invalid SQL:
SELECT helpfulpost.postid as postid,post.threadid as threadid
FROM helpfulpost as helpfulpost
INNER JOIN post AS post ON(helpfulpost.postid = post.postid);
MySQL Error : Table 'example_vb.helpfulpost' doesn't exist
Error Number : 1146
Request Date : Thursday, July 23rd 2009 @ 02:55:42 AM
Error Date : Thursday, July 23rd 2009 @ 02:55:44 AM
Script : http://www.example.com/community/admincp/plugin.php?do=productimport
Referrer : http://www.example.com/community/admincp/plugin.php?do=productadd
IP Address : xxx.xxx.xxx.xxx
Classname : vB_Database
MySQL Version : 5.0.81-community