Handle packages with broken names

[John Tait]

raceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/aptdaemon/worker.py", line 179, in _process_transaction
    self.commit_packages(*self.trans.packages)
  File "/usr/lib/python2.6/dist-packages/aptdaemon/worker.py", line 227, in commit_packages
    self._commit_changes()
  File "/usr/lib/python2.6/dist-packages/aptdaemon/worker.py", line 726, in _commit_changes
    self._check_obsoleted_dependencies()
  File "/usr/lib/python2.6/dist-packages/aptdaemon/worker.py", line 518, in _check_obsoleted_dependencies
    for pkg in self._cache:
  File "/usr/lib/python2.6/dist-packages/apt/cache.py", line 173, in __iter__
    yield self[pkgname]
  File "/usr/lib/python2.6/dist-packages/apt/cache.py", line 158, in __getitem__
    pkg = self._weakref[key] = Package(self, self._cache[key])
KeyError: 'libwavefront-st!ndalone3.0'

[Sebastian Heinlein (glatzor)]

There seems to be a disk error on your system which breaks the list of available packages.

You should check your hard drive and re-check for updates.