Comment 6 for bug 26058

From upstream [ http://savannah.gnu.org/bugs/?func=detailitem&item_id=15048#comment5 ]:
<quote>
If your system is using Novell ZenWorks, then remove this registry key:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]

"System"="ziswin.exe"

You'll need to reinstall GRUB again after doing this, but thereafter you should be fine. This setting causes some information to be written into the MBR each time you boot and thus hoses up GRUB.
</quote>

Since the very Novell stuff does not allow me to modify the registry, this bug won't fix unless something is changed in GRUB. On the other hand, LILO doesn't show this problem. (Although, I had to configure it manually). For Ubuntu, many questions remains:

Why GRUB and not LILO?
When LILO is installed from apt-get, why it is not automatically configured as GRUB is during the installation procedure?

Anyway, I guess this is the end...