Hi folks,
I had been pestering for 2 years about blank dialogs, and finaly, Curtis Wensley found out that it was due to an incompatibility between the Xceed.Wpf.Toolkit.dll file provided with Human UI and the one used by Rhino.
This has been solved, but maybe the problem is coming back with a vengeance.
I could PM you my GH definition, but it uses a bunch of other plug-ins and I can hear you complaining already about that as Giulio did…