Comment 1 for bug 1069748

I've proposed a merge to fix the shown exception here:
https://code.launchpad.net/~nuclearbob/utah/vm-teardown-fix/+merge/131082

The underlying issue is that the preseed contains a number of lines starting with {% block, which are currently being interpreted as duplicates of the same question by the preseed processing system. I'm discussing with the team how best to handle this.