Since updating to Enterprise 2013 workflow v18.104.22.168, When I set a variable to a user item property, the three dot button where i would previously have set 'Display Name' is not working. Clicking it does nothing. The browser console reports:
SCRIPT5007: Unable to get property 'selectedIndex' of undefined or null reference
This is impacting us quite seriosuly as we cannot get clean names into our documents.
Yup. Totally annoying.
As this is a bug in the product community can't help here. I did it already but maybe you can push that topic by creating an official ticket at email@example.com.