diff --git a/functions.js b/functions.js
index cb38ff37..ebf9232e 100644
--- a/functions.js
+++ b/functions.js
@@ -16,7 +16,43 @@ function is_opera() {
 	return window.opera;
 }
 
+function exception_error_ext(location, e, ext_info) {
+	var msg = format_exception_error(location, e);
+	var ebc = document.getElementById("xebContent");
+
+	disableHotkeys();
+
+	if (ebc) {
+
+		Element.show("dialog_overlay");
+		Element.show("extendedErrorBox");
+
+		if (ext_info) {
+			if (ext_info.responseText) {
+				ext_info = ext_info.responseText;
+			}
+		}
+
+		ebc.innerHTML = 
+			"<div><b>Error message:</b></div>" +
+			"<pre>" + msg + "</pre>" +
+			"<div><b>Additional information:</b></div>" +
+			"<textarea readonly=\"1\">" + ext_info + "</textarea>";
+
+	} else {
+		alert(msg);
+	}
+}
+
 function exception_error(location, e, silent) {
+	var msg = format_exception_error(location, e);
+
+	if (!silent) {
+		alert(msg);
+	}
+}
+
+function format_exception_error(location, e) {
 	var msg;
 
 	if (e.fileName) {
@@ -34,11 +70,10 @@ function exception_error(location, e, silent) {
 
 	debug("<b>EXCEPTION: " + msg + "</b>");
 
-	if (!silent) {
-		alert(msg);
-	}
+	return msg;
 }
 
+
 function disableHotkeys() {
 	hotkeys_enabled = false;
 }
@@ -1243,22 +1278,33 @@ function leading_zero(p) {
 	return s;
 }
 
-function closeInfoBox(cleanup) {
+function closeErrorBox() {
 
-	Element.hide("dialog_overlay");
+	if (Element.visible("extendedErrorBox")) {
+		Element.hide("dialog_overlay");
+	
+		Element.hide("extendedErrorBox");
 
-	var box = document.getElementById('infoBox');
-	var shadow = document.getElementById('infoBoxShadow');
-
-	if (shadow) {
-		shadow.style.display = "none";
-	} else if (box) {
-		box.style.display = "none";
+		enableHotkeys();
 	}
 
-	if (cleanup) box.innerHTML = "&nbsp;";
+	return false;
+}
 
-	enableHotkeys();
+function closeInfoBox(cleanup) {
+
+	if (Element.visible("infoBoxShadow")) {
+		Element.hide("dialog_overlay");
+	
+		var shadow = document.getElementById('infoBoxShadow');
+		var box = document.getElementById('infoBoxShadow');
+
+		Element.hide(shadow);
+
+		if (cleanup) box.innerHTML = "&nbsp;";
+
+		enableHotkeys();
+	}
 
 	return false;
 }
diff --git a/tt-rss.css b/tt-rss.css
index 26c2729c..96502b56 100644
--- a/tt-rss.css
+++ b/tt-rss.css
@@ -2083,3 +2083,38 @@ ul#headlineActionsBody li.insensitive:hover {
 	cursor : normal;
 	color : gray;
 }
+
+div#extendedErrorBox {
+	left : 25%;
+	top : 70px;
+	width : 50%;
+	z-index : 999;
+	position : absolute;
+	min-width : 600px;
+	background-color : #ffcccc;
+	border : 1px solid #ff0000;
+	font-size : 12px;
+}
+
+div#extendedErrorBox div#xebTitle {
+	background-color : #ff0000;
+	color : white;
+	padding : 4px 2px 4px 10px;
+	color : white;
+	font-weight : bold;
+	font-size : 12px;
+}
+
+div#extendedErrorBox div#xebContent {
+	font-size : 12px;
+	padding : 10px;
+}
+
+div#extendedErrorBox textarea {
+	width : 100%;
+	height : 200px;
+}
+
+div#extendedErrorBox input {
+	margin-bottom : 10px;
+}
diff --git a/tt-rss.php b/tt-rss.php
index f56c1431..8f1dadd9 100644
--- a/tt-rss.php
+++ b/tt-rss.php
@@ -51,6 +51,14 @@
 
 	<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
 
+	<div id="extendedErrorBox" style="display : none">
+		<div id="xebTitle">Fatal Exception</div>
+		<div id="xebContent">&nbsp;</div>
+		<div align='center'>
+		<input type="submit" onclick="closeErrorBox()" value="Close this window"/>
+		</div>
+	</div>
+
 	<script type="text/javascript">
 	//<![CDATA[
 		if (navigator.userAgent.match("Opera")) {
diff --git a/viewfeed.js b/viewfeed.js
index 51335049..489a014d 100644
--- a/viewfeed.js
+++ b/viewfeed.js
@@ -234,7 +234,7 @@ function headlines_callback2(transport, feed_cur_page) {
 		remove_splash();
 
 	} catch (e) {
-		exception_error("headlines_callback2", e);
+		exception_error_ext("headlines_callback2", e, transport);
 	}
 }