In the event a media type exists in an app today, and is removed from…

… the app in the future, an exception will be thrown trying to restore the user's last selected tab. This fix simply tests first to see if the specified identifier is represented in the tab view, and if it is not, defaults to the first tab.

IMBPanelController.m

@@ -443,10 +443,14 @@ - (void) restoreStateFromPreferences
 			[self tabView:ibTabView willSelectTabViewItem:tabViewItem];
 			[self tabView:ibTabView didSelectTabViewItem:tabViewItem];
 		}
-		else
+		else if ([ibTabView indexOfTabViewItemWithIdentifier:mediaType] != NSNotFound)
 		{
 			[ibTabView selectTabViewItemWithIdentifier:mediaType];
 		}
+		else
+		{
+			[ibTabView selectFirstTabViewItem:nil];
+		}
 	}
 }