Comment 14 for bug 519075

Interesting. Indeed it seems to be possible to fix the issue by doing a

sudo aptitude reinstall libqt4-xml libqtcore4 libqtgui4
sudo aptitude purge eqonomize eqonomize-doc
sudo aptitude install eqonomize

but the funny thing is that aptitude claims that the version numbers are the same before and afterwards! Apparently a new version of something (presumably qt) was uploaded during the lucid beta phase without bumping the version number.