diff --git a/io/clipboard.cpp b/io/clipboard.cpp
index 8a699e379..1c3a8075b 100644
--- a/io/clipboard.cpp
+++ b/io/clipboard.cpp
@@ -8,14 +8,16 @@ QVector<void*> clipboard;
 QVector<Transition*> clipboard_transitions;
 
 void clear_clipboard() {
-	for (int i=0;i<clipboard.size();i++) {
+	uint clipboard_size = clipboard.size();
+	for (int i=0;i<clipboard_size;i++) {
 		if (clipboard_type == CLIPBOARD_TYPE_CLIP) {
 			delete static_cast<Clip*>(clipboard.at(i));
 		} else if (clipboard_type == CLIPBOARD_TYPE_EFFECT) {
 			delete static_cast<Effect*>(clipboard.at(i));
 		}
 	}
-	for (int i=0;clipboard_transitions.size();i++) {
+	clipboard_size = clipboard_transitions.size();
+	for (int i=0;i<clipboard_size;i++) {
 		delete clipboard_transitions.at(i);
 	}
 	clipboard.clear();
diff --git a/project/sourcescommon.cpp b/project/sourcescommon.cpp
index 0dd870944..04d6dc781 100644
--- a/project/sourcescommon.cpp
+++ b/project/sourcescommon.cpp
@@ -205,7 +205,7 @@ void SourcesCommon::dropEvent(QWidget* parent, QDropEvent *event, const QModelIn
 
 		// dragging files within project
 		// if we dragged to the root OR dragged to a folder
-		if (!drop_item.isValid() || (drop_item.isValid() && m->get_type() == MEDIA_TYPE_FOLDER)) {
+		if (!drop_item.isValid() || m->get_type() == MEDIA_TYPE_FOLDER) {
 			QVector<Media*> move_items;
 			for (int i=0;i<items.size();i++) {
 				const QModelIndex& item = items.at(i);
diff --git a/project/transition.cpp b/project/transition.cpp
index 63490797d..8ee186001 100644
--- a/project/transition.cpp
+++ b/project/transition.cpp
@@ -81,8 +81,8 @@ Transition* get_transition_from_meta(Clip* c, Clip* s, const EffectMeta* em) {
 
 int create_transition(Clip* c, Clip* s, const EffectMeta* em, long length) {
 	Transition* t = get_transition_from_meta(c, s, em);
-	if (length >= 0) t->set_length(length);
 	if (t != NULL) {
+		if (length >= 0) t->set_length(length);
 		QVector<Transition*>& transition_list = (c->sequence == NULL) ? clipboard_transitions : c->sequence->transitions;
 		transition_list.append(t);
 		return transition_list.size() - 1;