[Hardware Error]: No human readable MCE decoding support on this CPU type

Hello,
I've getting recurrent messages as follows;
[Hardware Error]: No human readable MCE decoding support on this CPU type.
[Hardware Error]: Run the message through 'mcelog --ascii' to decode.
[Hardware Error]: Machine check events logged
[Hardware Error]: No human readable MCE decoding support on this CPU type.
[Hardware Error]: Run the message through 'mcelog --ascii' to decode.
[Hardware Error]: Machine check events logged

The system is running RHEL 6.1 , kernel `2.6.32-131.0.15.el6.x86_64 #1 SMP Tue May 10 15:42:40 EDT 2011 x86_64 x86_64 x86_64 GNU/Linux`

What does this mean?

Is it a bug as indicated in http://mcelog.org/faq.html#13 ?