apt-xapian-index plugin broken with software-center 5.3.3; breaks quantal image builds

[Colin Watson]

software-center 5.3.3 broke all quantal image builds that contain software-center, with this error:

Traceback (most recent call last):
  File "/usr/sbin/update-apt-xapian-index", line 101, in <module>
    if not indexer.setupIndexing(force=opts.force, system=opts.pkgfile is None):
  File "/usr/lib/python2.7/dist-packages/axi/indexer.py", line 466, in setupIndexing
    self.plugins = Plugins(progress=self.progress, system=system)
  File "/usr/lib/python2.7/dist-packages/axi/indexer.py", line 89, in __init__
    addon = Addon(fullname, **kw)
  File "/usr/lib/python2.7/dist-packages/axi/indexer.py", line 49, in __init__
    self.module = imp.load_source("axi.plugin_" + self.name, fname)
  File "/usr/share/apt-xapian-index/plugins/software-center.py", line 13, in <module>
    from softwarecenter.db.update import index_name
ImportError: cannot import name index_name

I think something like http://paste.ubuntu.com/1067313/ should fix this, but I'm sort of guessing at the API change involved here.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[mebuntu (salsa-temps)]

I have done a fresh install of Kubuntu 12.10 and Muon search is not working, I purged and reinstalled, which gave me the line 101 error.