Extrange behavior after upgrade to 3.6

Hi there,

After upgrade to 2.6 the body backgroud of the post/page and sidebar invert the color.

In themia by default you have this white. Well, but now this is black. Here a screenshot.

http://screencast.com/t/TKhHjPqrp

and other one, this is the footer

http://screencast.com/t/LzR0FtGdIjXA

Any idea why this happen?