pgf version 2.00 debian package released
On my Ubuntu 8.04 (“Hardy Heron”) the pgf/TikZ graphics package version 1.18 was installed. The pgf version 2.0 offers new features and is needed by newer documents and packages. A debian package of that version is now available.
For information and download see pgf (2.00-1) on packages.debian.org.
Installation on Debian and Ubuntu Linux:
sudo dpkg -i pgf_2.00-1_all.deb