strange booting message

[Regnat Nikolaus]

Hello, I'm using Debian Woody, Kernel 2.4.5, ReiserFS (for the root fs) and 
Grub 0.5.96.1 ( I even tired the latest Debian Package - 
0.5.96.1.cvs20010530-6).

I'm getting the following message while booting the system:

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There are differences between the bootsector and it's backup.
Differences: (offset:original/backup)
28:3d/3f, 29:65/00, 30:9c/00, 71:44/00, 72:41/4f, 73:54/20, 74:45/4e,
75:4e/41, 76:20/4d, 77:20/45, 78:20/00, 79:20/00, 80:20/00, 81:20/00
Not automatically fixing this.
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I don't know if this is related to grub but I thought you could be interested 
in this incident. Do you know how to get rid of this?

Nik