Comment 4 for bug 318700

Setting up mawk (1.3.3-15ubuntu1) ...
update-alternatives: error: alternative link /usr/bin/awk is already managed by awk.before_restore_2008-12-09_12.08.26.323931.
dpkg: error processing mawk (--configure):
 subprocess installed post-installation script returned error exit status 2
Setting up chromium-browser (4.0.269.0~svn20091210r34249-0ubuntu1~ucd1~karmic) ...
update-alternatives: error: alternative link /usr/bin/x-www-browser is already managed by x-www-browser.before_restore_2008-12-09_12.08.26.323931.

This points to local corruption of your /var/lib/dpkg/alternatives directory. Closing as invalid.