I have a ticket open so these questions might be adressed to the fourm only. Don't want to double post but its kind of urgent so I look for both sides (Telerik/Forum) for advice.
I just upgraded a site from 5.3 to 5.4
I use a RadPanelbar for subnavigtion using the SitefinitSiteMap as datasource. both in my template.
Now in 5.3 everything worked fine. in 5.4 however it seems as soon as I have pages under a group page the navigation is lost.
http://www.marktold.com/screencast/sf_panelbar_grouppages.swf show what is happening.
Another Screencast demonstrating that pages under regular pages are working