I opened a bug 253016 to track the userland portion of the fix to this problem.
I'm using this bz to submit the kernel patch to rhkernel-list.
Posted patch to rhkernel-list:
Changing status to POST and reassigning to Don.
You can download this test kernel from http://people.redhat.com/dzickus/el5
I'm not able to reproduce the problem, but I can confirm the patch is in the -45
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 the 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.