The problem of Evolution is actually an "old" topic.
This was posted on another thread with rtegards to default applications:
"4. Even when you never use a particular default application: don't remove
it. Reason: the default installation is an intertwined system that's
dependent on shared supporting files, which makes the operating system run
stable.
When you remove a default application, you run a risk of seriously damaging
the system. With some default applications this risk is bigger than with
others, but it's best to avoid this risk altogether.
If you want to, you can remove an unused application from the menu, but don't
remove it from the system.
This limitation applies only to those applications, that are part of the
default installation of Ubuntu. Applications that you've added yourself, you
may remove without problems."
From: Easy Linux tips project. Avoid nine fatal mistakes.
http://sites.google.com/site/easylinuxtipsproject/fatalmistakes
On the other hand, I've noticed that Trisquel lists each package on its
website along with its depends, recommends, and suggests.
It looks like it may be possible to remove a package through Synaptic and
then to replace any one of the other packages by the same.
Pidgin is a package that I don't need, but i notice that if I try to remove
it through Synaptic it lists "Trisquel-recommends". I think it takes
something away from Totem also, though it may have been any one of those
Bluetooth packages I tried to get rid of.
