Error in logs after recent update to 4.2.0

[David Pullman]

I'm afraid I have no idea where to start looking for what the cause of 
this error my be.  We upgraded our display and bbtest server, which is a 
RHEL 4 x86_64 box, to 4.2.0 at the very end of June.  Since then we have 
the following about every ten minutes in /var/log/messages:

Jul 16 09:48:36 frodo-70 kernel: hobbitd_history[28138]: segfault at 
0000000000000000 rip 0000003e05f5ce3f rsp 0000007fbfff5020 error 4
Jul 16 09:48:41 frodo-70 kernel: hobbitd_history[28148]: segfault at 
0000000000000000 rip 0000003e05f5ce3f rsp 0000007fbfff5020 error 4
Jul 16 09:48:50 frodo-70 kernel: hobbitd_history[28161]: segfault at 
0000000000000000 rip 0000003e05f5ce3f rsp 0000007fbfff5020 error 4
Jul 16 09:58:55 frodo-70 kernel: hobbitd_history[28899]: segfault at 
0000000000000000 rip 0000003e05f5ce3f rsp 0000007fbfff5020 error 4
Jul 16 09:59:00 frodo-70 kernel: hobbitd_history[28905]: segfault at 
0000000000000000 rip 0000003e05f5ce3f rsp 0000007fbfff5020 error 4
Jul 16 09:59:06 frodo-70 kernel: hobbitd_history[28915]: segfault at 
0000000000000000 rip 0000003e05f5ce3f rsp 0000007fbfff5020 error 4
Jul 16 09:59:10 frodo-70 kernel: hobbitd_history[28928]: segfault at 
0000000000000000 rip 0000003e05f5ce3f rsp 0000007fbfff5020 error 4
Jul 16 09:59:15 frodo-70 kernel: hobbitd_history[28934]: segfault at 
0000000000000000 rip 0000003e05f5ce3f rsp 0000007fbfff5020 error 4
Jul 16 09:59:20 frodo-70 kernel: hobbitd_history[28940]: segfault at 
0000000000000000 rip 0000003e05f5ce3f rsp 0000007fbfff5020 error 4

This system ran 4.1.2p1 for more than a year with no issues.  I did an 
upgrade in place.  No changes otherwise.

I would be very grateful for even the slightest hint on how to start 
looking for the problem.

Thanks very much

-- 
David Pullman
Systems Administrator
Manufacturing Engineering Laboratory
National Institute of Standards & Technology
Mail Stop 8203
100 Bureau Drive
Gaithersburg, MD 20899-8260
Tel: (301) 975-5385
Fax: (301) 926-3842
E-mail: david.pullman at nist.gov