Beware that repair falsely says device.map is incorrect.
Bug 547959 - Yast repairer unable to repair boot (grub) configuration - device.map error is still broken
https://bugzilla.novell.com/show_bug.cgi?id=547959
When the dialog says error - clicking help says what the error is!
It’s probably better to stay away from the YaST bootloader repair. There’s lots of information about on grub repairs and trouble after installing XP over grub.
BTW grub has known issues and is now officially called “Grub legacy” by GNU. Grub 2 is a lot more sensible but not yet ready for general use.