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This bug has been copied from bug #642584 and has been proposed
to be backported to 6.0 z-stream (EUS).

    Technical note added. If any revisions are required, please edit the "Technical Notes" field
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    New Contents:
On 64-bit x86 systems with support for AVX vector registers, an insufficient alignment of the thread descriptor may have caused an application to crash during symbol resolution. With this update, the "TCB_ALIGNMENT" value has been increased to 32 bytes, and applications no longer crash.

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2010-0872.html