Upgrade Tool Crashed (6.10->7.04) during "cleaning up"

Binary package hint: update-manager

Traceback (most recent call last):
  File "/tmp/kde-root/adept_managerVQ2DAa.tmp-extract/dist-upgrade.py", line 56, in ?
    app.run()
  File "/tmp/kde-root/adept_managerVQ2DAa.tmp-extract/DistUpgradeControler.py", line 1025, in run
    self.fullUpgrade()
  File "/tmp/kde-root/adept_managerVQ2DAa.tmp-extract/DistUpgradeControler.py", line 1014, in fullUpgrade
    self.doPostUpgrade()
  File "/tmp/kde-root/adept_managerVQ2DAa.tmp-extract/DistUpgradeControler.py", line 740, in doPostUpgrade
    res = self.cache.commit(fprogress,iprogress)
  File "/usr/lib/python2.4/site-packages/apt/cache.py", line 204, in commit
    if res == pm.ResultCompleted:
  File "/usr/lib/python2.4/site-packages/apt/cache.py", line 179, in installArchives
    installProgress.finishUpdate()
  File "/usr/lib/python2.4/site-packages/apt/progress.py", line 206, in run
    select.select([self.statusfd],[],[], self.selectTimeout)
  File "/tmp/kde-root/adept_managerVQ2DAa.tmp-extract/DistUpgradeViewKDE.py", line 227, in fork
    self.child_pid = os.fork()
OSError: [Errno 12] Cannot allocate memory