Comment 2 for bug 818984

According to Dependencies.txt

python-egenix-mxdatetime 3.2.0-1
python-egenix-mxtools 3.2.0-1
python-genshi 0.6-1ubuntu2
python-lxml 2.3-0.1build1
python-minimal 2.7.2-4ubuntu3
python-pkg-resources 0.6.16-1
python-psycopg2 2.4.2-1

are installed, but probaly not properly (recompiled) for python2.7.

Anyway it is not an issue with trytond, but rather with python-psycopg2, if any.