I use 18.104.22.168 on a MAC running 10.8.5
I can insert Umlaute with the text tool, no issue so far. I then can pdf or print. But after save, close and re-open the Umlauts are replaced with other weird signs.
I used "standard" for texting.
Any ideas? It is not very convenient to go through the drawing each time before printing to insert the Umlauts.