diff --git a/YACReader/goto_flow_gl.cpp b/YACReader/goto_flow_gl.cpp
index a4fe1d1d..3d1652bd 100644
--- a/YACReader/goto_flow_gl.cpp
+++ b/YACReader/goto_flow_gl.cpp
@@ -16,6 +16,7 @@ GoToFlowGL::GoToFlowGL(QWidget* parent, FlowType flowType)
 {
 
 	flow = new YACReaderPageFlowGL(this);
+	flow->setShowMarks(false);
 
 	imageSize = Configuration::getConfiguration().getGotoSlideSize();
 
diff --git a/YACReader/main_window_viewer.cpp b/YACReader/main_window_viewer.cpp
index a0c0e210..6e991612 100644
--- a/YACReader/main_window_viewer.cpp
+++ b/YACReader/main_window_viewer.cpp
@@ -94,7 +94,7 @@ void MainWindowViewer::setupUI()
 	connect(versionChecker,SIGNAL(newVersionDetected()),
 		this,SLOT(newVersion()));
 
-	//versionChecker->get(); //TODO
+	versionChecker->get(); //TODO
 	
 	viewer->setFocusPolicy(Qt::StrongFocus);
 	
@@ -332,6 +332,8 @@ void MainWindowViewer::createToolBars()
 	tb2->setMenu(menu);
 
 	connect(sliderAction,SIGNAL(fitToWidthRatioChanged(float)),viewer,SLOT(updateFitToWidthRatio(float)));
+	connect(optionsDialog,SIGNAL(fitToWidthRatioChanged(float)),sliderAction,SLOT(updateFitToWidthRatio(float)));
+
 
 	//tb2->addAction();
 	tb2->setPopupMode(QToolButton::MenuButtonPopup);
diff --git a/YACReader/options_dialog.cpp b/YACReader/options_dialog.cpp
index 2dbbaf59..e3d6e782 100644
--- a/YACReader/options_dialog.cpp
+++ b/YACReader/options_dialog.cpp
@@ -263,4 +263,13 @@ void OptionsDialog::resetImageConfig()
 	settings.setValue(CONTRAST,100);
 	settings.setValue(GAMMA,100);
 	emit(changedImageOptions());
+}
+
+void OptionsDialog::show()
+{
+	//TODO solucionar el tema de las settings, esto sólo debería aparecer en una única línea de código
+	QSettings *s = new QSettings(QCoreApplication::applicationDirPath()+"/YACReader.ini",QSettings::IniFormat);
+	fitToWidthRatioS->setSliderPosition(settings->value(FIT_TO_WIDTH_RATIO).toFloat()*100);
+	QDialog::show();
+	delete s;
 }
\ No newline at end of file
diff --git a/YACReader/options_dialog.h b/YACReader/options_dialog.h
index 66e24115..395be78c 100644
--- a/YACReader/options_dialog.h
+++ b/YACReader/options_dialog.h
@@ -53,6 +53,7 @@ Q_OBJECT
 		void contrastChanged(int value);
 		void gammaChanged(int value);
 		void resetImageConfig();
+		void show();
 
 signals:
 		void changedOptions();
diff --git a/YACReader/render.cpp b/YACReader/render.cpp
index 92b2b2e5..d2b1edf5 100644
--- a/YACReader/render.cpp
+++ b/YACReader/render.cpp
@@ -635,6 +635,8 @@ void Render::nextPage()
 		currentIndex = nextPage;
 		update();
 	}
+	else
+		emit isLast();
 }
 //si se solicita la página anterior, se calcula cuál debe ser en función de si se lee en modo a doble página o no.
 //la página sólo se renderiza, si realmente ha cambiado.
@@ -663,6 +665,8 @@ void Render::previousPage()
 		currentIndex = previousPage;
 		update();
 	}
+	else
+		emit isCover();
 }
 unsigned int Render::getIndex()
 {
@@ -742,8 +746,7 @@ void Render::goTo(int index)
 void Render::rotateRight()
 {
 	imageRotation = (imageRotation+90) % 360;
-	invalidate();
-	update();
+    reload();
 }
 void Render::rotateLeft()
 {
@@ -751,8 +754,7 @@ void Render::rotateLeft()
 		imageRotation = 270;
 	else
 		imageRotation = imageRotation - 90;
-	invalidate();
-	update();
+	reload();
 }
 
 //Actualiza el buffer, añadiendo las imágenes (vacías) necesarias para su posterior renderizado y
@@ -890,7 +892,7 @@ void Render::invalidate()
 	{
 		if(pageRenders[i]!=0)
 		{
-			pageRenders[i]->terminate();
+			pageRenders[i]->wait();
 			delete pageRenders[i];
 			pageRenders[i] = 0;
 		}
diff --git a/YACReader/width_slider.cpp b/YACReader/width_slider.cpp
index 1bdb8ad5..1cc11ee0 100644
--- a/YACReader/width_slider.cpp
+++ b/YACReader/width_slider.cpp
@@ -68,4 +68,11 @@ void YACReaderSliderAction::updateText(int value)
 	percentageLabel->setText(QString("%1 %").arg(value));
 	Configuration::getConfiguration().setFitToWidthRatio(value/100.0);
 	emit(fitToWidthRatioChanged(value / 100.0f));
+}
+
+void YACReaderSliderAction::updateFitToWidthRatio(float v)
+{
+	int value = v*100;
+	slider->setValue(value);
+	percentageLabel->setText(QString("%1 %").arg(value));
 }
\ No newline at end of file
diff --git a/YACReader/width_slider.h b/YACReader/width_slider.h
index fe0c656c..6fb97f08 100644
--- a/YACReader/width_slider.h
+++ b/YACReader/width_slider.h
@@ -12,12 +12,14 @@ class YACReaderSliderAction : public QWidgetAction
 private:
 	QLabel * percentageLabel;
 	QSlider * slider;
+
 public:
 	
     YACReaderSliderAction (QWidget * parent = 0);
 
 public slots:
 	void updateText(int value);
+	void updateFitToWidthRatio(float v);
 
 
 signals:
diff --git a/common/check_new_version.cpp b/common/check_new_version.cpp
index 744bada7..e83a4633 100644
--- a/common/check_new_version.cpp
+++ b/common/check_new_version.cpp
@@ -7,7 +7,7 @@
 #define PREVIOUS_VERSION "5.0.0"
 
 HttpVersionChecker::HttpVersionChecker()
-        :QWidget()
+        :QThread()
 {
     http = new QHttp(this);
 
@@ -22,6 +22,12 @@ HttpVersionChecker::HttpVersionChecker()
 }
 
 void HttpVersionChecker::get()
+{
+	this->start();
+
+}
+
+void HttpVersionChecker::run()
 {
     QUrl url("http://code.google.com/p/yacreader/downloads/list");
     QHttp::ConnectionMode mode = QHttp::ConnectionModeHttp;
@@ -30,6 +36,7 @@ void HttpVersionChecker::get()
     if (path.isEmpty())
          path = "/";
     httpGetId = http->get(path, 0);
+	exec();
 }
 void HttpVersionChecker::readResponseHeader(const QHttpResponseHeader &responseHeader)
 {
@@ -48,6 +55,7 @@ void HttpVersionChecker::httpRequestFinished(int requestId, bool error)
 	QString response(content);
 #endif
 	checkNewVersion(response);
+	exit();
 }
 
 //TODO escribir prueba unitaria
diff --git a/common/check_new_version.h b/common/check_new_version.h
index 2fc7610b..ace01f75 100644
--- a/common/check_new_version.h
+++ b/common/check_new_version.h
@@ -5,10 +5,10 @@
 #include <QHttp>
 #include <QHttpResponseHeader>
 #include <QByteArray>
-
+#include <QThread>
 #include "yacreader_global.h"
 
- class HttpVersionChecker : public QWidget
+ class HttpVersionChecker : public QThread
  {
          Q_OBJECT
     public:
@@ -20,6 +20,7 @@
         void read(const QHttpResponseHeader &);
         void get();
     private:
+		void run();
         QHttp *http;
         int httpGetId;
         QByteArray content;
diff --git a/common/yacreader_flow_gl.cpp b/common/yacreader_flow_gl.cpp
index 0917ca8e..5490ec10 100644
--- a/common/yacreader_flow_gl.cpp
+++ b/common/yacreader_flow_gl.cpp
@@ -711,7 +711,7 @@ void YACReaderFlowGL::populate(int n)
 	}*/
 
 	loaded = QVector<bool>(n,false);
-	marks = QVector<bool>(n,false);
+	//marks = QVector<bool>(n,false);