[O] Bug of code block

[Du Yanning]

win7
emacs 23.3
org-mode 7.7


The appearance of source code inside code block
#+BEGIN_SRC c++
  void foo()
  {
  }
#+END_SRC
is affected by M-x buffer-face-set.
However, It should look exactly the same as it is in a c++-mode buffer.