I just upgraded the site http://socialpollination.biz/answers/ to v1.2beta to address the WordPress AJAX issue. However, after a few errors with the upgrade, I decided to start with a clean database. I've reinstalled the tables with a new prefix, and integrated the WP users. However, when attempting to ask a question, I get the following error.
It appears to be tied to the WordPress user tables integration, since I am able to ask a question when disabling that functionality.
I also noticed this thread: http://www.question2answer.org/qa/1643/1-2-beta-1-external-users-error where they mentioned an issue with BlueHost. That is the current host for the site. Not sure if it matters, but I thought I'd include that.
I have the same issue but I can't fix it. I do not use wordpress.
prior to the database install.
This would happen if you install the database with internal user management, and then change later to single sign-on integration. In other words, you need to set QA_EXTERNAL_USERS before installing the database, so that it doesn't create a qa_users (or in your case, qa2_users) table, with corresponding foreign key constraints.

