Comment 5 for bug 728924

I've tested with lxml 2.3 version, but bug remains.
Here is new versions:

Python : (2, 6, 6, 'final', 0)
lxml.etree : (2, 3, 0, 0)
libxml used : (2, 7, 8)
libxml compiled : (2, 7, 8)
libxslt used : (1, 1, 26)
libxslt compiled : (1, 1, 26)

I've testing now one guess. I think this bug could be caused by multiprocess library use. Cause my script runing in multiple instances(Instances are independent). And when i run it in one instance, bug didn't appear(but may exist).