diff -r 2881c4424190 -r 3086ee01554a vymmodel.cpp
--- a/vymmodel.cpp	Mon Dec 07 21:56:46 2009 +0000
+++ b/vymmodel.cpp	Thu Dec 10 17:04:48 2009 +0000
@@ -2339,11 +2339,20 @@
 	if (branch && dst)
 	{
 		unselect();
-
+ 
 		emit (layoutAboutToBeChanged() );
 		BranchItem *branchpi=(BranchItem*)branch->parent();
 		// Remove at current position
 		int n=branch->childNum();
+
+/* FIXME-4 seg since 20091207, if ModelTest active. strange.
+		// error occured if relinking branch to empty mainbranch
+		cout<<"VM::relinkBranch:\n";
+		cout<<"    b="<<branch->getHeadingStd()<<endl;
+		cout<<"  dst="<<dst->getHeadingStd()<<endl;
+		cout<<"  pos="<<pos<<endl;
+		cout<<"   n1="<<n<<endl;
+*/		
 		beginRemoveRows (index(branchpi),n,n);
 		branchpi->removeChild (n);
 		endRemoveRows();