Autocomplete #combobox, When wraped in form it reloads page when pressed dropdown btn

Autocomplete #combobox, When wraped in form it reloads page when pressed dropdown btn

1. I am new to jquery UI, and had used a lot of time trying to figure out autocomplete combobox.
I think it's bugged because when I wrap <select> in <form> </form> and click dropdown button page gets reloaded.
Simple way to test: In demos folder autocomplete combobox html add form tag around select
 - Using fresh ui 1.8 and jquery 1.4.2.

2. How can I set start value of new input (like original dropdown had selected).

Best regards,
Bojan Kuzmanovic