(If there's another way to report bugs, please let me know and accept my 
apologies for cluttering the list)

SL5 has a bug in the driver for the Realtek RTL8169sc/8110sc ethernet cards, 
presumably inherited from RedHat.  Basically, the most recent versions of this 
driver, such as that in 2.6.18-194.11.1.el5, write the MAC address back to the 
card at shutdown, but do it badly, zeroing out the leading 4 bytes of the 
address.  This changes the card's address until the next power-cycle. A bug 
report has been filed for Fedora, number 573201, but I don't see one for RHEL.

thanks,

Steve Gaarder
System Administrator, Dept of Mathematics
Cornell University, Ithaca, NY, USA
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