Systemback live with LVM+separate boot partition

Hi All,

I've been using systemback for a long time now, to create customized Lubuntu LiveCDs, always worked great. Today, I've reinstalled my Lubuntu, and now systemback cannot create those anymore. Errors out every time, without any details. Except for two big differences, everything else is the same with this new installation as with the old.
1: LVM. The old installation was on a regular logical partition (MBR disk). The new one is a partition in an LVM Volume Group.
2: Separate /boot partition. With this new installation, I've separated /boot to its own partition (for future additional distros)

So, the question is: is anything known as to systemback working (or not working) with LVM and/or separate /boot?
It's possible that it would work with either, but not the combination. If anyone can say for sure that it does work with either of these (either LVM or separate /boot) then I can assume that it's the other one that's the problem

Any help/info?

Thanks,
Benjamin