Mozilla/5.0 (X11; U; Linux armv7l; Nokia N900; en-US; rv:1.9.2pre) Gecko/20100119 Firefox/3.6pre Fennec/1.1a1pre
Steps to Reproduce:
1. Go to www.facebook.com and login.
2. Pan down to the bottom of the page and click on "Touch Site"
3. Pan down to the bottom of the page and click on "Full Site"
The top and bottom bar are 2/5's the width of the viewable browser window and the bottom bar still floats.
The top and bottom bar should be equal to the full width of the viewable area.
This happens on the login screen going from touche site to full site.