diff -r 00ac7b2ac016 -r 6a7db028088e flagrowobj.cpp
--- a/flagrowobj.cpp	Mon May 08 13:25:46 2006 +0000
+++ b/flagrowobj.cpp	Mon May 08 13:25:46 2006 +0000
@@ -161,6 +161,8 @@
 
 void FlagRowObj::activate (const QString &foname)
 {
+	// Note: "activate" is also called during loading of a map
+	// Here we do not check for exclusive flags!
 	FlagObj *fo=findFlag (foname);
 	if (parentRow)
 	{
@@ -219,10 +221,14 @@
 	// deactivate all flags in keepof, but keep keepfo [sic!]
 	if (keepfo)
 	{
-		FlagObj *fo;
-		for (fo=flag.first();fo; fo=flag.next() )
-			if (keepfo->getGroup()==fo->getGroup() && keepfo!=fo) 
-				flag.remove(fo);
+		QString g=keepfo->getGroup();
+		if (g!="undefined")
+		{
+			FlagObj *fo;
+			for (fo=flag.first();fo; fo=flag.next() )
+				if (g==fo->getGroup() && keepfo!=fo) 
+					flag.remove(fo);
+		}		
 	}	
 }