Warning in_array() expects parameter 2 to be array,...

Hi, I recently updated BEF from 7.x-3.0.beta1 to 7.x-3.0.beta3.

I'm getting warning message that:

Warning in_array() expects parameter 2 to be array, null given in better_exposed_filters_exposed_form_plugin->exposed_form_alter() (line 591 of \sites\all\modules\better_exposed_filters\better_exposed_filters_exposed_form_plugin.inc)

and also when I try to filter date type exposed filter, I get :

the value input for field start date is invalid:
the value 10/24/2012 does not match the expected format.

drupal core version: 7.16
views: 7.x-3.5
date: 7.x-2.6

please help. thank you.