Checksum error Bios 1007 with Boot Block?

I used Assus Live update and loaded Bios 1007. The bios flashed fine. Now I did a little OC and noticed something new. I get a check sum error with Boot Block. Has anyone experienced this before and what does this mean? When I had the 1005 Bios, I had never seen this message.

I reloaded my original bios with Asus Live update (thank God I save my original bios on file). My rig is back to 1005 dated 5-14-2003. For some reason, back on 10-13-2003 I loaded rev 1007 dated 10-6-2003. Assus has it dated 10-9-2003. Must have loaded a beta version. Anyway, Asus Live Update did selected the final version of 1007 with correct date but I elected not to load it since I did better OC with 1005. FYI