Probably this problem was introduced by revision 2133 and obviously
wasn't fixed in rev 2134 - 2137 and in 2138 - 2140 I can see nothing
which might fix this.
It would be great if somebody could have a look what could cause this
problem. Maybe davem as the author of that revision.
If you need any additional information give me a yell and I'll try my
best to provide it.
==============
Decided to start a new topic more fitting to this problem. Sorry for
what looks like a double posting.
I just tested on one machine, running grub-mkdevicemap -v from the
shell, which resulted in a segfault and blank device.map file in
/boot/grub!
Looks like some bug was introduced after svn2130 in the file.
Thanks devs for your attention to this one.