I just hit this bug too. Seems to be a problem (or weirdness) in
glibc. See:
http://ryanarn.blogspot.co.uk/2011/07/curious-case-of-pthreadatfork-on.html
https://lists.fedoraproject.org/pipermail/ppc/2012-June/001655.html
Rich.
--
Richard Jones, Virtualization Group, Red Hat
http://people.redhat.com/~rjones
libguestfs lets you edit virtual machines. Supports shell scripting,
bindings from many languages.
http://libguestfs.org