diff -r b1c2c2f6fc5e -r 45b63c2a694f QTfrontend/pages.cpp
--- a/QTfrontend/pages.cpp	Wed Oct 27 14:02:20 2010 +0200
+++ b/QTfrontend/pages.cpp	Wed Oct 27 14:23:47 2010 +0200
@@ -778,6 +778,12 @@
 
 void PageOptions::setFullscreen(void)
 {
+    int tmp = this->CBResolution->currentIndex();
+    if (this->CBFullscreen->isChecked())
+        this->CBResolution->setCurrentIndex(0);
+    else
+        this->CBResolution->setCurrentIndex(previousResolutionIndex);
+    previousResolutionIndex = tmp;
     this->CBResolution->setEnabled(!this->CBFullscreen->isChecked());
 }