Tested on runbot: http://7-0-16044.runbot.openerp.com/?db=7-0-16044-all

Is it a bug?

Steps to reproduce

1. Activate debug mode;
2. Go to Sale Customer, it's kanban view by default;
3. Click debug view dropdown menu, click Edit Action; in the popup window, scroll down, click Kanban View, edit sequence to 1, click Tree View, edit seq. to 0.
4. Go to Sale Customer, now it's tree view by default; Now click the red button Create, the form sheet goes to the bottom of the browser window.