Poll doesn't preview correctly in some circumstances

Steps:

1. Go to some topic and click on Create Topic button
2. leave topic's title and message empty, but fill Poll's fields: name, several options
3. Click on Preview button

AR: Validation error for topic and Poll preview are shown in the same time
ER: No preview is shown if there are validation errors

If you enter valid text into message content after 3rd step and click Preview button again, Preview will be shown without Poll part.

Look this video http://screencast.com/t/C9kTyCq3D