By default, when not using CM, if I bind a ListBox for example to a List<Item> the text displayed for ListBoxItem is the value of ToString of Item object.
But, when using CM, the framework tried to find a view for Item (which is fine) and if it didn't find one it displays "Cannot find view for Blah.Namespace.Item".
This behaviour should change to have ListBoxItem display the value of ToString.
The same applicable to any other control that have the same behaviour as ListBox.
for more details about the issue.