There has been a bugfix release of serienbrief (see http://nasauber.de/blog/text.php?text=133 ). The existing ebuild can simply be renamed and installs the new version in the same way as the old. Additionally, the older versions can be removed from portage. Both 0.2.2 and 0.2.3 have been bugfix releases, as 0.2.4 is -- no need to keep them.
What about the version bump? As said, the ebuild can simply be renamed ...
bumped, thanks!