The "Sidebar second" panel area is almost off the screen on the site template edit page.
What browser are you using?
Current version of chrome 17.xxxxxx with the "Seven" admin theme.
I pushed up the fix to dev - needed to add the missing bits of the layout that make it work in other admin themes (other than my own).
Automatically closed -- issue fixed for 2 weeks with no activity.
Drupal is a registered trademark of Dries Buytaert.