Compute service's run_instance method fails due to wrong datatype from db

Attempting to run instances with current packages yields this:

2010-10-08 15:01:47+0200 [-] Traceback (most recent call last):
2010-10-08 15:01:47+0200 [-] File "/usr/lib/pymodules/python2.6/nova/compute/manager.py", line 86, in run_instance
2010-10-08 15:01:47+0200 [-] yield self.driver.spawn(instance_ref)
2010-10-08 15:01:47+0200 [-] AttributeError: 'int' object has no attribute 'startswith'
2010-10-08 15:01:47+0200 [-] Unhandled error in Deferred:
2010-10-08 15:01:47+0200 [-] Unhandled Error
        Traceback (most recent call last):
          File "/usr/lib/pymodules/python2.6/nova/exception.py", line 76, in _wrap
            return f(*args, **kw)
          File "/usr/lib/pymodules/python2.6/nova/rpc.py", line 171, in receive
            d = defer.maybeDeferred(node_func, **node_args)
          File "/usr/lib/python2.6/dist-packages/twisted/internet/defer.py", line 125, in maybeDeferred
            result = f(*args, **kw)
          File "/usr/lib/python2.6/dist-packages/twisted/internet/defer.py", line 1014, in unwindGenerator
            return _inlineCallbacks(None, f(*args, **kwargs), Deferred())
        --- <exception caught here> ---
          File "/usr/lib/python2.6/dist-packages/twisted/internet/defer.py", line 891, in _inlineCallbacks
            result = result.throwExceptionIntoGenerator(g)
          File "/usr/lib/python2.6/dist-packages/twisted/python/failure.py", line 338, in throwExceptionIntoGenerator
            return g.throw(self.type, self.value, self.tb)
          File "/usr/lib/pymodules/python2.6/nova/compute/manager.py", line 98, in run_instance
            self._update_state(context, instance_id)
          File "/usr/lib/pymodules/python2.6/nova/compute/manager.py", line 62, in _update_state
            state = self.driver.get_info(instance_ref.name)['state']
          File "/usr/lib/pymodules/python2.6/nova/virt/libvirt_conn.py", line 334, in get_info
            virt_dom = self._conn.lookupByName(instance_name)
          File "/usr/lib/python2.6/dist-packages/libvirt.py", line 1441, in lookupByName
            ret = libvirtmod.virDomainLookupByName(self._o, name)
        exceptions.TypeError: virDomainLookupByName() argument 2 must be string or None, not int

This is because the internal id changed from a string to an integer.