Apparently the default ViewMode for the RadEditor ImageManager for SharePoint 2010 is now set as "Thumbnail". The problem is that our clients got used to the "Grid" view displayed as default in the SharePoint 2007 edition.
I'm looking for a simple solution to set the property via the ConfigFile.xml but I can't manage to find one. According to your help page (http://www.telerik.com/help/aspnet-ajax/moss-sp2010-image_manager.html), it seems that it's not possible to change it using the configuration file.
Is there another way to change it or did I miss something ?