Password and Confirm password fields has different values

Description
Preconditions:
1. Open http://qa.jtalks.org/jcommune/user/new page in one tab
*Choose localization (will be advised if necessary)
2. Open http://qa.jtalks.org/jcommune/ page in another tab
*Choose localization (will be advised if necessary)
3. Open pop-up dialog by clicking on Sign Up link

#2 Steps to reproduce:
4. Enter different passwords into Password/Confirm password text fields (e.g. "1" and "2")
5. Submit the form by pressing Enter key
Actual result on a page:
Entered passwords are not reset after submitting
http://screencast.com/t/WHPnbqIQVLCO
Actual result in a pop-up dialog:
Entered passwords are reset after submitting
http://screencast.com/t/JIjIWJkK9YbO