Bug#505905: grub-common: Update to grub2 fails with Windows XP partitions

[Debian]

Package: grub-common
Version: 1.96+20080724-12
Severity: important

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After a system-upgrade it was not clear how to test if grub 2 is working.
I thought the legacy version was already replaced for boot.

Everything looks fine and so i executed upgrade-from-grub-legacy

Linux is booting fine with grub 2 but Windows is dead!
It starts booting and then it dies with a bluescreen.

There is no scriptway to turn it back!
And why can't grub 2 boot windows ?

I also want to hide partitions.
I can't find a command to do that.

So where is the benfit of grub 2 ???

Now i replaced it with the legacy version again:
apt-get remove grub-common grub-pc
apt-get install grub


-- System Information:
Debian Release: lenny/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.26-1-amd64 (SMP w/2 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=ISO-8859-1) (ignored:
LC_ALL set to de_DE)
Shell: /bin/sh linked to /bin/bash

Versions of packages grub-common depends on:
ii  base-files                    4.0.5      Debian base system miscellaneous f
ii  libc6                         2.7-15     GNU C Library: Shared libraries

grub-common recommends no packages.

Versions of packages grub-common suggests:
pn  multiboot-doc                 <none>     (no description available)