I'm running Ubuntu 11.04 an I verified the problem with the i386 and amd_64 version.
I open Blender and type in the python-console:
import multiprocessing.synchronize

This produces the following error:
Traceback (most recent call last):
File "<blender_console>", line 1, in <module>
File "/opt/blender-2.59-linux-glibc27-x86_64/2.59/python/lib/python3.2/multiprocessing/synchronize.py", line 59, in <module>
" function, see issue 3770.")
ImportError: This platform lacks a functioning sem_open implementation, therefore, the required synchronization primitives needed will not function, see issue 3770.

If I try the same command in the regular python installation in the console it works fine with python 2.7 and 3.2.

I tested the problem with Blender 2.59 and 2.58a.