diff --git a/qad_blockview/blockbusitem.cpp b/qad_blockview/blockbusitem.cpp
index b7a36c0..0dcc423 100644
--- a/qad_blockview/blockbusitem.cpp
+++ b/qad_blockview/blockbusitem.cpp
@@ -218,7 +218,7 @@ void BlockBusItem::simplify(bool full) {
 				else sp[i] = pol[segments[segs[i]].first];
 			}
 			QLineF l0(sp[0], cp), l1(cp, sp[1]);
-			if (l0.angle() != l1.angle()) continue;
+			if (qAbs(l0.angle() - l1.angle()) > 0.1) continue;
 			if (segments[s0].first == p) {
 				if (segments[s1].first == p) segments[s0].first = segments[s1].second;
 				else segments[s0].first = segments[s1].first;
@@ -313,6 +313,22 @@ BlockBusItem * BlockBusItem::copy() const {
 }
 
 
+void BlockBusItem::saveState() {
+	segments_s = segments;
+	ends_ind_s = ends_ind;
+	ends_s = ends;
+	pol_s = pol;
+}
+
+
+void BlockBusItem::restoreState() {
+	segments = segments_s;
+	ends_ind = ends_ind_s;
+	ends = ends_s;
+	pol = pol_s;
+}
+
+
 void BlockBusItem::updateGeometry() {
 	ends = endpoints();
 	ends_ind.clear();
@@ -359,21 +375,25 @@ QVector<int> BlockBusItem::endpoints() const {
 }
 
 
-QVector<int> BlockBusItem::endpointLine(int ep) const {
+QVector<int> BlockBusItem::endpointLine(int ep, double angle) const {
 	QVector<int> ret;
 	int seg = -1;
 	int np = segmentPointPair(ep, &seg), pp = np;
 	if (ep < 0 || np < 0) return ret;
 	if (pol[np] == pol[ep]) return ret;
-	QPointF sp = pol[np] - pol[ep];
-	bool sdir = (qAbs(sp.x()) >= qAbs(sp.y()));
+	//QPointF sp = pol[np] - pol[ep];
+	QLineF l(pol[ep], pol[np]);
+	//qDebug() << "first" << l.angle() << angle << (l.angle() != angle);
+	if (qAbs(l.angle() - angle) > 0.1) return ret;
+	//qDebug() << "check next" << segments.size();
 	for (int i = 0; i < segments.size(); ++i) {
+		//qDebug() << i << np << pointSegmentsCount(np);
 		if (np < 0) break;
 		if (pointSegmentsCount(np) != 2) break;
 		if (i > 0) {
-			sp = pol[np] - pol[pp];
-			bool idir = (qAbs(sp.x()) >= qAbs(sp.y()));
-			if (sdir != idir) break;
+			QLineF l(pol[pp], pol[np]);
+			//qDebug() << i << l.angle() << angle;
+			if (qAbs(l.angle() - angle) > 0.1) break;
 		}
 		ret << np;
 		pp = np;
diff --git a/qad_blockview/blockbusitem.h b/qad_blockview/blockbusitem.h
index 4f337ee..2552418 100644
--- a/qad_blockview/blockbusitem.h
+++ b/qad_blockview/blockbusitem.h
@@ -62,6 +62,9 @@ public:
 	QByteArray save() const;
 	void load(const QByteArray & data);
 	BlockBusItem * copy() const;
+
+	void saveState();
+	void restoreState();
 	
 	enum {Type = UserType + 2};
 	
@@ -72,7 +75,7 @@ protected:
 	void checkDelete();
 	void emitAction(BlockItemBase::Action a);
 	QVector<int> endpoints() const;
-	QVector<int> endpointLine(int ep) const;
+	QVector<int> endpointLine(int ep, double angle) const;
 	int pointSegmentsCount(int point, QList<int> * segs = 0) const;
 	int neighborSegmentPoint(int point, int * seg) const;
 	int type() const {return Type;}
@@ -90,11 +93,11 @@ protected:
 	QPen p_, ph, pu, pa, pr, pn;
 	QBrush b_, bh, bu, ba, br;
 	QString tt, bus_name;
-	QList<QPair<int, int> > segments, ends_ind;
+	QList<QPair<int, int> > segments, ends_ind, segments_s, ends_ind_s;
 	QMap<int, BlockItemPin * > connections_;
-	QVector<int> ends;
+	QVector<int> ends, ends_s;
 	QImage im_bus, im_end;
-	QPolygonF pol, bpol;
+	QPolygonF pol, bpol, pol_s;
 	Qt::KeyboardModifiers mm_mods;
 	bool temp_;
 	double pen_width, grid_step;
diff --git a/qad_blockview/blockview.cpp b/qad_blockview/blockview.cpp
index 2f3e959..92b7ac2 100644
--- a/qad_blockview/blockview.cpp
+++ b/qad_blockview/blockview.cpp
@@ -316,8 +316,10 @@ bool BlockView::eventFilter(QObject * o, QEvent * e) {
 			if (mm_cancel) return true;
 			if (me->buttons().testFlag(Qt::LeftButton)) {
 				if (!mm_drag) {
-					if ((screen_point - me->screenPos()).manhattanLength() >= QApplication::startDragDistance())
+					if ((screen_point - me->screenPos()).manhattanLength() >= QApplication::startDragDistance()) {
 						mm_drag = fmm_drag = true;
+						saveBusesState();
+					}
 				} else {
 					if (tmp_bus.isVisible()) {
 						mil = scene_->items(me->scenePos());
@@ -956,6 +958,20 @@ void BlockView::saveSelState() {
 }
 
 
+void BlockView::saveBusesState() {
+	QList<BlockBusItem*> bl = buses();
+	foreach (BlockBusItem * b, bl)
+		b->saveState();
+}
+
+
+void BlockView::restoreBusesState() {
+	QList<BlockBusItem*> bl = buses();
+	foreach (BlockBusItem * b, bl)
+		b->restoreState();
+}
+
+
 void BlockView::applySelRect(QGraphicsSceneMouseEvent * me) {
 	QList<QGraphicsItem*> ci = sel_rect.collidingItems(Qt::IntersectsItemBoundingRect);
 	QList<QGraphicsItem*> gi = scene_->items();
@@ -1218,7 +1234,7 @@ void BlockView::moveBuses(const QList<QGraphicsItem * > & items, QPointF dp) {
 	QList<QGraphicsItem * > gi = scene_->items();
 	QVector<BlockItemPin * > pins;
 	QList<BlockBusItem * > buses;
-	//qDebug() << "move";
+	//qDebug() << "move" << dp;
 	foreach (QGraphicsItem * i, items)
 		if (i->data(1006) == "item" && i->flags().testFlag(QGraphicsItem::ItemIsMovable))
 			pins << qgraphicsitem_cast<BlockItem*>(i)->pins();
@@ -1255,9 +1271,15 @@ void BlockView::moveBuses(const QList<QGraphicsItem * > & items, QPointF dp) {
 					}
 				}*/
 				QPointF pdp = dp;
-				if (p->alignment() == Qt::AlignTop || p->alignment() == Qt::AlignBottom) pdp.setY(0.);
-				if (p->alignment() == Qt::AlignLeft || p->alignment() == Qt::AlignRight) pdp.setX(0.);
-				QVector<int> epl = b->endpointLine(ends[i]);
+				double ang = 0.;
+				switch (p->alignment()) {
+				case Qt::AlignRight : pdp.setX(0.); ang = 0.;  break;
+				case Qt::AlignTop   : pdp.setY(0.); ang = 90.;   break;
+				case Qt::AlignLeft  : pdp.setX(0.); ang = 180.; break;
+				case Qt::AlignBottom: pdp.setY(0.); ang = 270.; break;
+				default: break;
+				}
+				QVector<int> epl = b->endpointLine(ends[i], ang);
 				foreach (int e, epl)
 					b->movePoint(e, pdp);
 				b->movePoint(ends[i], dp);
diff --git a/qad_blockview/blockview.h b/qad_blockview/blockview.h
index cb07e9c..db0078a 100644
--- a/qad_blockview/blockview.h
+++ b/qad_blockview/blockview.h
@@ -90,6 +90,8 @@ protected:
 	void thumbShow();
 	void restoreSelState();
 	void saveSelState();
+	void saveBusesState();
+	void restoreBusesState();
 	void applySelRect(QGraphicsSceneMouseEvent * me);
 	void applyGridStep();
 	void trace(QPointF scene_pos_from, QPointF scene_pos_to, BlockBusItem * bus);
diff --git a/qad_widgets/session_manager.cpp b/qad_widgets/session_manager.cpp
index 9210d6e..23e2706 100644
--- a/qad_widgets/session_manager.cpp
+++ b/qad_widgets/session_manager.cpp
@@ -87,16 +87,24 @@ void SessionManager::load(bool onlyMainwindow) {
 		checks[i].second->setChecked(sr.getValue(checks[i].first, checks[i].second->isChecked()));
 	for (int i = 0; i < lines.size(); ++i)
 		lines[i].second->setText(sr.getValue(lines[i].first, lines[i].second->text()));
-	for (int i = 0; i < combos.size(); ++i)
-		combos[i].second->setCurrentIndex(sr.getValue(combos[i].first, combos[i].second->currentIndex()));
+	for (int i = 0; i < combos.size(); ++i) {
+		QComboBox * c = combos[i].second;
+		int v = sr.getValue(combos[i].first, c->currentIndex());
+		if (v >= 0 && v < c->count())
+			c->setCurrentIndex(v);
+	}
 	for (int i = 0; i < dspins.size(); ++i)
 		dspins[i].second->setValue(sr.getValue(dspins[i].first, dspins[i].second->value()));
 	for (int i = 0; i < spins.size(); ++i)
 		spins[i].second->setValue(sr.getValue(spins[i].first, spins[i].second->value()));
 	for (int i = 0; i < spinsliders.size(); ++i)
 		spinsliders[i].second->setValue(sr.getValue(spinsliders[i].first, spinsliders[i].second->value()));
-	for (int i = 0; i < tabs.size(); ++i)
-		tabs[i].second->setCurrentIndex(sr.getValue(tabs[i].first, tabs[i].second->currentIndex()));
+	for (int i = 0; i < tabs.size(); ++i) {
+		QTabWidget * t = tabs[i].second;
+		int v = sr.getValue(tabs[i].first, t->currentIndex());
+		if (v >= 0 && v < t->count())
+			t->setCurrentIndex(v);
+	}
 	for (int i = 0; i < actions.size(); ++i)
 		actions[i].second->setChecked(sr.getValue(actions[i].first, actions[i].second->isChecked()));
 	for (int i = 0; i < stringlists.size(); ++i)