hi iv a strange problem
i working on a theme
and after upgrading my wp 3.7.1 to 3.8
the main loop display page and post (instead only posts)
in the beginning i thought maybe something wrong with my theme.
so, i install a new wp 3.7.1 and new wp 3.8 , and it work fine on them.
i must say that the problem happen when i did the upgrade