diff --git a/styles/subsilver2/template/portal/modules/portal_clock.js b/styles/subsilver2/template/portal/modules/portal_clock.js
index a5279c65..d4407e4e 100644
--- a/styles/subsilver2/template/portal/modules/portal_clock.js
+++ b/styles/subsilver2/template/portal/modules/portal_clock.js
@@ -20,9 +20,16 @@ phpbb.b3pFlipClock = function(identifierUp, identifierDown, val, type) {
 	var backIdUp = identifierUp.replace('-front-', '-back-');
 	var backIdDown = identifierDown.replace('-front-', '-back-');
 	var backPosition = $(backIdUp).css('background-position');
-	var backPositionLength = backPosition.length;
+	var backPositionLength;
 	var backY;
 
+	// Workaround for Internet Explorer bug
+	if (backPosition === undefined) {
+		backPosition = $(backIdUp).css('background-position-x') + ' ' + $(backIdUp).css('background-position-y');
+	}
+
+	backPositionLength = backPosition.length;
+
 	if (backPosition.substring(backPositionLength - 3, backPositionLength - 2) === '0') {
 		backY = '0px';
 	} else {
@@ -59,6 +66,12 @@ phpbb.b3pFlipClock = function(identifierUp, identifierDown, val, type) {
 
 	// now get the vertical offset of the bottom digit
 	backPosition = $(identifierDown).css('background-position');
+
+	// Workaround for Internet Explorer bug
+	if (backPosition === undefined) {
+		backPosition = $(identifierDown).css('background-position-x') + ' ' + $(identifierDown).css('background-position-y');
+	}
+
 	backPositionLength = backPosition.length;
 
 	if (backPosition.substring(backPositionLength - 3, backPositionLength - 2) === '0') {
@@ -86,6 +99,7 @@ phpbb.b3pFlipClock = function(identifierUp, identifierDown, val, type) {
 		return;
 	}
 
+	// Animate the top number flipping
 	$(identifierUp).animate({
 			height: '0px',
 			'margin-top': '21px'
@@ -94,13 +108,20 @@ phpbb.b3pFlipClock = function(identifierUp, identifierDown, val, type) {
 			'duration': 150,
 			defaultEasing: 'easeInOutSine',
 			'complete': function(){
+				// Now animate the bottom number flipping
 				$(identifierDown).animate(
 					{height: '20px'},
 					{
 						'duration': 150,
 						defaultEasing: 'easeInOutSine',
 						'complete': function(){
-							$(backIdDown).css('background-position', $(identifierDown).css('background-position'));
+							// For compatibility with IE8
+							if ($(identifierDown).css('background-position') !== undefined) {
+								$(backIdDown).css('background-position', $(identifierDown).css('background-position'));
+							} else {
+								$(backIdDown).css('background-position-x', $(identifierDown).css('background-position-x'));
+								$(backIdDown).css('background-position-y', $(identifierDown).css('background-position-y'));
+							}
 							$(identifierDown).css({
 								'visibility': 'hidden',
 								'display': 'inline-block'