When running xfce4-about (for instance, desktop menu, then select "about"), it
claims it is version 4.2.2 even though 4.2.3 is installed.
As far as I can tell, all xfce-related files have been rebuilt from the new
version and installed.
Steps to Reproduce:
The version is given by libxfce4util. And libxfce4util is correctly set to 4.2.3
in libxfce4util 4.2.3.
So the problem comes from your installation. Also, it's 188.8.131.52 now.