This bug is still around and has hit me today after upgrading from Debian Squeeze to a apt-pinned Xen 4.1 setup with linux-image-3.2.0-2-amd64.
As this is a grave bug for Xen 4.1 actually, why not apply the patch for now to get a working package for systems using dash (which is the declared default for Debian anyway). I can confirm this patch is working fine.
