How to fix Mathematica 5 on Ubuntu 7.10

Mathematica 5 crashes on Ubuntu 7.10 as it assumes "historical" locations of some X11 directories. In order to fix it:

$ sudo ln -s /usr/share/X11/XKeysymDB \
> /usr/X11R6/lib/X11/XKeysymDB
$ sudo ln -s /usr/share/X11/locale \
> /usr/X11R6/lib/X11/locale
$ sudo ln -s /usr/share/fonts/X11 \
> /usr/share/X11/fonts