Comment 8 for bug 647466

I've upgraded to maverick, and that for the above reasons, and also because the old version of gcalctool reads from the numeric keypad without you having to have numlock on, have downgraded to the lucid version as described above.

For anyone else who has done (or is doing this) I've found that, after installation, running

echo "gcalctool hold" | dpkg --set-selections

as root solves the problem of automatic updates trying to re-'upgrade' it back to the more modern, but less functional version.