Originally Posted by willysr
You should contact the maintainer or discuss it in slackbuilds-user mailing list
Posting to the slackbuilds-user list was my first thought but I anticipated being asked to move the thread here. :-)
Anyway, I looked closely at what rxvt-unicode adds to rxvt and decided to remove the package for the time being. When the virtual terminal is vanilla rxvt it does not properly display accented characters. If it can, then I need to learn what to add to the command line (or config file) to allow it to do so.