I'm using an evaluation version of Qt 4.4.0. I made a plugin that, other than creating a render area viewer instead of an examiner, is the same as SoQtWidgetPlugin.

Designer complains when this plugin is selected from the Widget Box:

"A class name mismatch occurred when creating a widget using the custom widget factory registered for widgets of class SoQtRenderAreaWidgetPlugin. It returned a widget of class SoQtWrapper."

Any ideas? The SoQtWidgetPlugin also returns a class SoQtWrapper, with no problem.

Thanks in advance for any help,
Martin