Index: branches/RC/core/admin_templates/js/jquery/thickbox/thickbox.js
===================================================================
diff -u -N -r11678 -r11711
--- branches/RC/core/admin_templates/js/jquery/thickbox/thickbox.js	(.../thickbox.js)	(revision 11678)
+++ branches/RC/core/admin_templates/js/jquery/thickbox/thickbox.js	(.../thickbox.js)	(revision 11711)
@@ -540,14 +540,29 @@
 		vertical: $window.outerHeight() - $window.height()
 	};
 
+	var $top = $(window).scrollTop() + Math.round((pagesize[1] - TB.Height - $borders.vertical) / 2);
+	var $left = Math.round((pagesize[0] - TB.Width - $borders.horizontal) / 2);
+
 	$window.css(
 		{
 			width: TB.Width + 'px',
-			height: TB.Height + 'px',
-			left: Math.round((pagesize[0] - TB.Width - $borders.horizontal) / 2) + 'px',
-			top: $(window).scrollTop() + Math.round((pagesize[1] - TB.Height - $borders.vertical) / 2) + 'px'
+			height: TB.Height + 'px'
 		}
-	)
+	);
+
+	if ($left > 0) {
+		// when something large is opened from right, then we got negative left
+		// (negative values breaks down "draggable.containment")
+		$window.css('left', $left + 'px');
+	}
+
+	if ($top > 0) {
+		// when Firebug console is opened from bottom, then we got negative top
+		// (negative values breaks down "draggable.containment")
+		$window.css('top', $top + 'px');
+	}
+
+	$window
 	.resizable(
 		{
 			alsoResize: '#' + TB.getId('TB_iframeContent'),