diff --git a/skins/default/addressbook.css b/skins/default/addressbook.css
index 6badf9058..ce82a1594 100644
--- a/skins/default/addressbook.css
+++ b/skins/default/addressbook.css
@@ -23,7 +23,7 @@
   padding: 0;
   margin-right: 10px;
   overflow: hidden;
-  background: url('images/abook_toolbar.png') 0 0 no-repeat transparent;
+  background: url(images/abook_toolbar.png) 0 0 no-repeat transparent;
   opacity: 0.99; /* this is needed to make buttons appear correctly in Chrome */
 }
 
@@ -69,7 +69,7 @@
 
 #abooktoolbar span.separator {
   width: 5px;
-  background-image: url('images/abook_toolbar.png');
+  background-image: url(images/abook_toolbar.png);
   background-position: -162px 0;
 }
 
diff --git a/skins/default/common.css b/skins/default/common.css
index 1ff4f32d7..833eb3a55 100644
--- a/skins/default/common.css
+++ b/skins/default/common.css
@@ -161,7 +161,7 @@ img
   color: #666666;
   text-decoration: none;
   padding: 6px 14px 6px 27px;
-  background: url('images/taskicons.gif') no-repeat;
+  background: url(images/taskicons.gif) no-repeat;
 }
 
 #taskbar a:hover
@@ -211,7 +211,7 @@ img
 #message div.notice,
 #remote-objects-message
 {
-  background: url('images/display/icons.png') 6px 3px no-repeat;
+  background: url(images/display/icons.png) 6px 3px no-repeat;
   background-color: #F7FDCB;
   border: 1px solid #C2D071;
 }
@@ -219,21 +219,21 @@ img
 #message div.error,
 #message div.warning
 {
-  background: url('images/display/icons.png') 6px -97px no-repeat;
+  background: url(images/display/icons.png) 6px -97px no-repeat;
   background-color: #EF9398;
   border: 1px solid #DC5757;
 }
 
 #message div.confirmation
 {
-  background: url('images/display/icons.png') 6px -47px no-repeat;
+  background: url(images/display/icons.png) 6px -47px no-repeat;
   background-color: #A6EF7B;
   border: 1px solid #76C83F;
 }
 
 #message div.loading
 {
-  background: url('images/display/loading.gif') 6px 3px no-repeat;
+  background: url(images/display/loading.gif) 6px 3px no-repeat;
   background-color: #EBEBEB;
   border: 1px solid #CCCCCC;
 }
@@ -255,7 +255,7 @@ img
   padding: 0;
   margin: 1px;
   overflow: hidden;
-  background: url('images/pagenav.gif') 0 0 no-repeat transparent;
+  background: url(images/pagenav.gif) 0 0 no-repeat transparent;
   opacity: 0.99; /* this is needed to make buttons appear correctly in Chrome */
 }
 
@@ -320,7 +320,7 @@ img
   color: #333;
   font-size: 11px;
   font-weight: bold;
-  background: url('images/listheader.gif') top left repeat-x #CCC;
+  background: url(images/listheader.gif) top left repeat-x #CCC;
 }
 
 .boxcontent
@@ -402,7 +402,7 @@ table.records-table thead tr td
   vertical-align: middle;
   border-bottom: 1px solid #999999;
   color: #333333;
-  background: url('images/listheader.gif') top left repeat-x #CCC;
+  background: url(images/listheader.gif) top left repeat-x #CCC;
   font-size: 11px;
   font-weight: bold;
 }
@@ -450,7 +450,7 @@ table.records-table tr.unfocused td
   width: 182px;
   height: 20px;
   text-align: right;
-  background: url('images/searchfield.gif') top left no-repeat;
+  background: url(images/searchfield.gif) top left no-repeat;
 }
 
 #searchreset
diff --git a/skins/default/ie6hacks.css b/skins/default/ie6hacks.css
index 11a5b1d3c..ee8200731 100644
--- a/skins/default/ie6hacks.css
+++ b/skins/default/ie6hacks.css
@@ -2,7 +2,7 @@
 
 img
 {
-  behavior: url('skins/default/pngbehavior.htc');
+  behavior: url(skins/default/pngbehavior.htc);
 }
 
 #message div.notice,
@@ -11,19 +11,19 @@ img
 #message div.confirmation,
 #remote-objects-message
 {
-  background-image: url('images/display/icons.gif');
+  background-image: url(images/display/icons.gif);
 }
 
 #messagemenu li a,
 #messagelist tr td div.expanded,
 #messagelist tr td div.collapsed
 {
-  background-image: url('images/messageactions.gif');
+  background-image: url(images/messageactions.gif);
 }
 
 #mailboxlist li
 {
-  background-image: url('images/icons/folders.gif');
+  background-image: url(images/icons/folders.gif);
 }
 
 #attachment-list
@@ -40,13 +40,13 @@ img
 
 #messagetoolbar a.button,
 #messagetoolbar a.buttonPas {
-  background-image: url('images/mail_toolbar.gif');
+  background-image: url(images/mail_toolbar.gif);
 }
 
 #abooktoolbar a.button,
 #abooktoolbar a.buttonPas,
 #abooktoolbar span.separator {
-  background-image: url('images/abook_toolbar.gif');
+  background-image: url(images/abook_toolbar.gif);
 }
 
 ul.toolbarmenu li a
diff --git a/skins/default/iehacks.css b/skins/default/iehacks.css
index e9bbe6725..7dd023e73 100644
--- a/skins/default/iehacks.css
+++ b/skins/default/iehacks.css
@@ -58,20 +58,20 @@ input, textarea
 #abooktoolbar a.buttonPas
 {
   filter: alpha(opacity=35);
-  background-image: url('images/abook_toolbar.gif');
+  background-image: url(images/abook_toolbar.gif);
 }
 
 #messagetoolbar a.buttonPas
 {
   filter: alpha(opacity=35);
-  background-image: url('images/mail_toolbar.gif');
+  background-image: url(images/mail_toolbar.gif);
 }
 
 #listcontrols a.buttonPas,
 #mailboxcontrols a.buttonPas
 {
   filter: alpha(opacity=35);
-  background-image: url('images/mail_footer.png');
+  background-image: url(images/mail_footer.png);
 }
 
 #messagetoolbar select.mboxlist
diff --git a/skins/default/mail.css b/skins/default/mail.css
index 0a7afe9d7..0e35046c0 100644
--- a/skins/default/mail.css
+++ b/skins/default/mail.css
@@ -29,7 +29,7 @@
   padding: 0;
   margin-right: 10px;
   overflow: hidden;
-  background: url('images/mail_toolbar.png') 0 0 no-repeat transparent;
+  background: url(images/mail_toolbar.png) 0 0 no-repeat transparent;
   opacity: 0.99; /* this is needed to make buttons appear correctly in Chrome */
 }
 
@@ -184,7 +184,7 @@
 
 #messagemenu li a
 {
-  background: url('images/messageactions.png') no-repeat 7px 0;
+  background: url(images/messageactions.png) no-repeat 7px 0;
   background-position: 7px 20px;
 }
 
@@ -215,22 +215,22 @@
 
 #markmessagemenu a.readlink
 {
-  background: url('images/icons/dot.png') no-repeat 7px 2px;
+  background: url(images/icons/dot.png) no-repeat 7px 2px;
 }
 
 #markmessagemenu a.unreadlink
 {
-  background: url('images/icons/unread.png') no-repeat 7px 2px;
+  background: url(images/icons/unread.png) no-repeat 7px 2px;
 }
 
 #markmessagemenu a.flaggedlink
 {
-  background: url('images/icons/flagged.png') no-repeat 7px 2px;
+  background: url(images/icons/flagged.png) no-repeat 7px 2px;
 }
 
 #markmessagemenu a.unflaggedlink
 {
-  background: url('images/icons/unflagged.png') no-repeat 7px 2px;
+  background: url(images/icons/unflagged.png) no-repeat 7px 2px;
 }
 
 #searchfilter
@@ -404,7 +404,7 @@ td.formlinks a:visited
   display: block;
   position: relative;
   font-size: 11px;
-  background: url('images/icons/folders.png') 5px 0 no-repeat;
+  background: url(images/icons/folders.png) 5px 0 no-repeat;
   border-bottom: 1px solid #EBEBEB;
 }
 
@@ -426,12 +426,12 @@ td.formlinks a:visited
 
 #mailboxlist li div.collapsed
 {
-  background: url('images/icons/collapsed.png') bottom right no-repeat;
+  background: url(images/icons/collapsed.png) bottom right no-repeat;
 }
 
 #mailboxlist li div.expanded
 {
-  background: url('images/icons/expanded.png') bottom right no-repeat;
+  background: url(images/icons/expanded.png) bottom right no-repeat;
 }
 
 #mailboxlist li.inbox
@@ -545,7 +545,7 @@ td.formlinks a:visited
   padding: 0;
   margin-right: 2px;
   overflow: hidden;
-  background: url('images/mail_footer.png') 0 0 no-repeat transparent;
+  background: url(images/mail_footer.png) 0 0 no-repeat transparent;
   opacity: 0.99; /* this is needed to make buttons appear correctly in Chrome */
 }
 
@@ -670,7 +670,7 @@ body.messagelist
   vertical-align: middle;
   border-bottom: 1px solid #999999;
   color: #333333;
-  background: url('images/listheader.gif') top left repeat-x #CCC;
+  background: url(images/listheader.gif) top left repeat-x #CCC;
   font-size: 11px;
   font-weight: bold;
 }
@@ -683,12 +683,12 @@ body.messagelist
 
 #messagelist thead tr td.sortedASC a
 {
-  background: url('images/icons/sort.gif') right 0 no-repeat;
+  background: url(images/icons/sort.gif) right 0 no-repeat;
 }
 
 #messagelist thead tr td.sortedDESC a
 {
-  background: url('images/icons/sort.gif') right -14px no-repeat;
+  background: url(images/icons/sort.gif) right -14px no-repeat;
 }
 
 #messagelist thead tr td a
@@ -790,13 +790,13 @@ body.messagelist
 #messagelist tr td div.collapsed
 {
   display: block;
-  background: url('images/messageactions.png') center -91px no-repeat;
+  background: url(images/messageactions.png) center -91px no-repeat;
 }
 
 #messagelist tr td div.expanded
 {
   display: block;
-  background: url('images/messageactions.png') center -109px no-repeat;
+  background: url(images/messageactions.png) center -109px no-repeat;
 }
 
 #messagelist tbody tr td.flag img:hover,
diff --git a/skins/default/settings.css b/skins/default/settings.css
index 1193c5142..a9c5e7b38 100644
--- a/skins/default/settings.css
+++ b/skins/default/settings.css
@@ -21,7 +21,7 @@ span.tablink-selected
   height: 22px;
   overflow: hidden;
   text-overflow: ellipsis;
-  background: url('images/tabs.gif') top left no-repeat;
+  background: url(images/tabs.gif) top left no-repeat;
 }
 
 span.tablink-selected