Note
If you find some frequent question that might be important please send it via mail to info@ecidadania.org or create a new ticket in the bugtracker describing it.
These are some of the usual cases you can find while installing e-cidadania.
You have installed PIL without support for jpglib, a library that helps PIL understand images. You need to install the package libjpeg-dev or the equivalent in your distribution.
You will have to install the Python development libraries in your systems, they provide the necessary files for PIL and other tools to compile. The package is python-dev (or python-devel) or the equivalent in your distribution.
This is actually a problem of the pip servers, they have very annoying downtimes. Please try again later :)
There can be a lot of reason for this to happen, but the usuals are:
Note
More reasons to come.