diff --git a/highlighter.cc b/highlighter.cc
index 7543b4d7..017d6b21 100644
--- a/highlighter.cc
+++ b/highlighter.cc
@@ -36,6 +36,7 @@ void Highlighter::highlightBlock(const QString &text)
 		QTextCharFormat style;
 		style.setBackground(Qt::red);
 		setFormat(0, text.size(), style);
+		style.setBackground(Qt::black);
 		style.setForeground(Qt::white);
 		setFormat(parser_error_pos - n, 1, style);
 	}
diff --git a/mainwin.cc b/mainwin.cc
index d63990e6..cf17c88e 100644
--- a/mainwin.cc
+++ b/mainwin.cc
@@ -415,12 +415,8 @@ void MainWindow::compile(bool procevents)
 	delete highlighter;
 	highlighter = new Highlighter(editor->document());
 
-	if (!root_module) {
-		QTextCursor cursor = editor->textCursor();
-		cursor.setPosition(parser_error_pos);
-		editor->setTextCursor(cursor);
+	if (!root_module)
 		goto fail;
-	}
 
 	PRINT("Compiling design (CSG Tree generation)...");
 	if (procevents)
diff --git a/render.cc b/render.cc
index cfbd51ed..3bb07de7 100644
--- a/render.cc
+++ b/render.cc
@@ -220,7 +220,7 @@ CSGTerm *RenderNode::render_csg_term(double m[16], QVector<CSGTerm*> *highlights
 QString RenderNode::dump(QString indent) const
 {
 	if (dump_cache.isEmpty()) {
-		QString text = indent + QString("n%1: ").arg(idx) + QString("render() {\n");
+		QString text = indent + QString("n%1: ").arg(idx) + QString("render(convexity = %1) {\n").arg(QString::number(convexity));
 		foreach (AbstractNode *v, children)
 			text += v->dump(indent + QString("\t"));
 		((AbstractNode*)this)->dump_cache = text + indent + "}\n";