MemoryError in _fetch_weave_text during branch on linux

[Extra info: This is Ubuntu Feisty Fawn running in VM Server on top of WinXP.]

ubuntu:~/scheme$ uname -a
Linux ubuntu 2.6.20-16-server #2 SMP Thu Jun 7 20:26:23 UTC 2007 i686 GNU/Linux

ubuntu:~/scheme$ bzr branch -v http://bazaar.launchpad.net/~aghuloum/ikarus/ikarus.dev
bzr: ERROR: exceptions.MemoryError:

Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 806, in run_bzr_catch_errors
    return run_bzr(argv)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 762, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 492, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib/python2.5/site-packages/bzrlib/builtins.py", line 907, in run
    accelerator_tree=accelerator_tree)
  File "/usr/lib/python2.5/site-packages/bzrlib/bzrdir.py", line 939, in sprout
    revision_id=revision_id)
  File "/usr/lib/python2.5/site-packages/bzrlib/decorators.py", line 127, in read_locked
    return unbound(self, *args, **kwargs)
  File "/usr/lib/python2.5/site-packages/bzrlib/repository.py", line 1003, in sprout
    dest_repo.fetch(self, revision_id=revision_id)
  File "/usr/lib/python2.5/site-packages/bzrlib/repository.py", line 916, in fetch
    return inter.fetch(revision_id=revision_id, pb=pb, find_ghosts=find_ghosts)
  File "/usr/lib/python2.5/site-packages/bzrlib/decorators.py", line 165, in write_locked
    return unbound(self, *args, **kwargs)
  File "/usr/lib/python2.5/site-packages/bzrlib/repository.py", line 2521, in fetch
    pb=pb)
  File "/usr/lib/python2.5/site-packages/bzrlib/fetch.py", line 103, in __init__
    self.__fetch()
  File "/usr/lib/python2.5/site-packages/bzrlib/fetch.py", line 132, in __fetch
    self._fetch_everything_for_revisions(revs, pp)
  File "/usr/lib/python2.5/site-packages/bzrlib/fetch.py", line 158, in _fetch_everything_for_revisions
    self._fetch_weave_text(file_id, revisions)
  File "/usr/lib/python2.5/site-packages/bzrlib/fetch.py", line 210, in _fetch_weave_text
    to_weave.join(from_weave, version_ids=required_versions)
  File "/usr/lib/python2.5/site-packages/bzrlib/versionedfile.py", line 421, in join
    ignore_missing)
  File "/usr/lib/python2.5/site-packages/bzrlib/knit.py", line 2575, in join
    self.target._add_raw_records(raw_records, ''.join(raw_datum))
MemoryError

bzr 1.1.0 on python 2.5.1.final.0 (linux2)
arguments: ['/usr/bin/bzr', 'branch', '-v', 'http://bazaar.launchpad.net/~aghuloum/ikarus/ikarus.dev']
encoding: 'UTF-8', fsenc: 'UTF-8', lang: 'en_US.UTF-8'
plugins:
  launchpad /usr/lib/python2.5/site-packages/bzrlib/plugins/launchpad [unknown]
  multiparent /usr/lib/python2.5/site-packages/bzrlib/plugins/multiparent.pyc [unknown]
*** Bazaar has encountered an internal error.
    Please report a bug at https://bugs.launchpad.net/bzr/+filebug
    including this traceback, and a description of what you
    were doing when the error occurred.