After upgrading to the 4.0.x series (verified with latest 4.0.3) I realized that the icons for banning URLs or deleting comments in the admin backoffice don't show up when usgin google chrome browser. Everything displays nicely in firefox, but not in chrome.

After digging around I found a couple of errors in the HTML. Here's a patch to fix it:

=== modified file 'inc/comments/model/_comment.class.php'
--- inc/comments/model/_comment.class.php       2010-11-08 13:37:47 +0000
+++ inc/comments/model/_comment.class.php       2010-12-26 23:24:39 +0000
@@ -738,7 +738,7 @@
 
                if( $ajax_button )
                {
-                       echo ' <a href="javascript:delete_comment_url('.$this->ID.');"'.get_icon( 'delete' ).'</a>';
+                       echo ' <a href="javascript:delete_comment_url('.$this->ID.');">'.get_icon( 'delete' ).'</a>';
                }
                else
                {
@@ -785,7 +785,7 @@
 
                if( $ajax_button )
                {
-                       echo ' <a id="ban_url" href="javascript:ban_url('.'\''.$authorurl.'\''.');"'.get_icon( 'ban' ).'</a>';
+                       echo ' <a id="ban_url" href="javascript:ban_url('.'\''.$authorurl.'\''.');">'.get_icon( 'ban' ).'</a>';
                }
                else
                {

=== modified file 'inc/comments/model/_comment.funcs.php'
--- inc/comments/model/_comment.funcs.php	2010-10-26 20:31:03 +0000
+++ inc/comments/model/_comment.funcs.php	2010-12-26 23:21:20 +0000
@@ -312,7 +312,7 @@
 function add_jsban( $url )
 {
 	$url = rawurlencode(get_ban_domain( $url ));
-	return '<a id="ban_url" href="javascript:ban_url('.'\''.$url.'\''.');"'.get_icon( 'ban' ).'</a>';
+	return '<a id="ban_url" href="javascript:ban_url('.'\''.$url.'\''.');">'.get_icon( 'ban' ).'</a>';
 }
 
 
@@ -396,4 +396,4 @@
 /*
  * $Log: _comment.funcs.php,v $
  */
-?>
\ No newline at end of file
+?>

As you can see there's a missing ">" in each case.