Ubuntu 11.04 breaks a lot of third party software

Ubuntu 11.04 does not package anymore some of the computational programs. The result is that
the software installation may not give hints of trouble, but running them give segmentation fault!

Here is one about Euler:

toto@toto-Aspire-4520:~$ euler

(euler:4939): Gdk-CRITICAL **: IA__gdk_char_width: assertion `font != NULL' failed
Segmentation fault

Gretl, an econmetrics package also gives a segmentation fault error. From gretl.sourceforge.net,
there is this message:

The default gretl package for Ubuntu 11.04 (natty) is broken; it should be replaced with gretl version 1.9.5, which is available via packages.debian.org.

We will add more after we install and run them in the latest version of Ubuntu.