Chapter 1, in which player creates ticket
Chapter 2, in which GM asks for more info
Chapter 3, in which player complies
Chapter 4, in which ticket is solved in typical Nexon fashion
Needless to say the issue never appeared on the Known Issues list, and other people complaining of Error 38's for various reasons on Nexon's forums were regularly ignored. I figured I would just have to keep on switching to a mule when I want to tend to my farm, until this disappears on its own as mysteriously as it appeared.
Chapter 5, the surprise twist
Looks like somebody has infiltrated Nexon's ticketing system (perhaps the same someone who's giving out free perma pets and other goodies?)
Chapter 6, the cliffhanger
Told them I still have the problem.
Now we will see whether anything actually happens with it.
Still, just having the ticket reopened, instead of hurriedly checked-off, is a good sign.