[O] Build fail with emacs 24.3.1

[Neuwirth Erich]

I just installed Emacs 24.3.1 on OSX 10.8.2
and tried to build the latest git version of orgmode. It fails.
Is this due to the fact that I have a new emacs,
or is it a more general problem.
Here is the output from building:


Ran 428 tests, 426 results as expected, 2 unexpected (2013-03-13 08:36:11+0100)
5 expected failures

2 unexpected results:
   FAILED  test-org-export/define-derived-backend
   FAILED  test-org-export/derived-backend-p

make[1]: *** [test-dirty] Error 1
make: *** [up2] Error 2