Hi,
I tested EntityForms 2.0 beta 2 on a completely freah and clean Drupal 7.24 with only the latest modules required to run Entityform. No other unneccessary modules are installed for a complete and clean testing.
When I click the simpletest_entityform submit link, fill out the Test Field and clicked submit, the following errors happen.

Notice: Undefined index: preview_page in entityform_edit_form_submit() (line 517 of E:\Paul_E\Websites\Test\drupal724\sites\all\modules\entityform\entityform.admin.inc).
Status message Your submission has been saved
Comments
Comment #1
tedbowThanks for reporting this.
Try this patch against 7.x-2.x dev
Comment #2
tedbowCommitted to 7.x-2.x