upgrade tool crash -upgr. to kubuntu 7.04

[melocotone]

Binary package hint: update-manager

During the "cleaning up" fase of upgrading kubuntu from 6.10 to 7.04 and after accepting removal of several lib files when asked by a dialog box with 2 options (remove/skip) this dialog appeared:

Upgrade Tool Crashed
We're sorry; the upgrade tool crashed. Please file a new bug report at https://launchpad.net/distros/ubuntu/+source/updte-manager/+filebug
(do not attach your details to any existing bug) and a developer will attend to the problem as soon as possible. ....

Details of the bug report:
--------------------------------------------------------------------------
Traceback (most recent call last):
  File "/tmp/kde-root/adept_updater97uq2a.tmp-extract/dist-upgrade.py", line 56, in ?
    app.run()
  File "/tmp/kde-root/adept_updater97uq2a.tmp-extract/DistUpgradeControler.py", line 1025, in run
    self.fullUpgrade()
  File "/tmp/kde-root/adept_updater97uq2a.tmp-extract/DistUpgradeControler.py", line 1014, in fullUpgrade
    self.doPostUpgrade()
  File "/tmp/kde-root/adept_updater97uq2a.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_updater97uq2a.tmp-extract/DistUpgradeViewKDE.py", line 227, in fork
    self.child_pid = os.fork()
OSError: [Errno 12] Cannot allocate memory
----------------------------------------------------------------------------

The machine where the upgrade was running is a HP Compaq nc6120 laptop with 1GB memory and a 40Gb harddisk that had plenty of room left. There was no other program running besides the distribution upgrade.

[Harek (kunca)]

The same problem and teh same crash report.
The machine is HP Compaq, 2GB ram, 40GB HDD, no other program runnings beside the distro upgrade.