diff --git a/bundled-libs/XML/RPC.php b/bundled-libs/XML/RPC.php
index 21a739a5..4339fbfb 100644
--- a/bundled-libs/XML/RPC.php
+++ b/bundled-libs/XML/RPC.php
@@ -430,7 +430,7 @@ function XML_RPC_ee($parser_resource, $name)
         } else {
             // we have an I4, INT or a DOUBLE
             // we must check that only 0123456789-.<space> are characters here
-            if (!ereg("^[+-]?[0123456789 \t\.]+$", $XML_RPC_xh[$parser]['ac'])) {
+            if (!preg_match("@^[+-]?[0123456789 \t\.]+$@i", $XML_RPC_xh[$parser]['ac'])) {
                 XML_RPC_Base::raiseError('Non-numeric value received in INT or DOUBLE',
                                          XML_RPC_ERROR_NON_NUMERIC_FOUND);
                 $XML_RPC_xh[$parser]['value'] = XML_RPC_ERROR_NON_NUMERIC_FOUND;
@@ -491,7 +491,7 @@ function XML_RPC_ee($parser_resource, $name)
 
     case 'METHODNAME':
     case 'RPCMETHODNAME':
-        $XML_RPC_xh[$parser]['method'] = ereg_replace("^[\n\r\t ]+", '',
+        $XML_RPC_xh[$parser]['method'] = preg_replace("@^[\n\r\t ]+@", '',
                                                       $XML_RPC_xh[$parser]['ac']);
         break;
     }
@@ -1199,7 +1199,7 @@ class XML_RPC_Message extends XML_RPC_Base
         }
         $this->payload .= "</params>\n";
         $this->payload .= $this->xml_footer();
-        $this->payload = ereg_replace("[\r\n]+", "\r\n", $this->payload);
+        $this->payload = preg_replace("@[\r\n]+@", "\r\n", $this->payload);
     }
 
     /**
@@ -1360,8 +1360,8 @@ class XML_RPC_Message extends XML_RPC_Base
 
         // See if response is a 200 or a 100 then a 200, else raise error.
         // But only do this if we're using the HTTP protocol.
-        if (ereg('^HTTP', $data) &&
-            !ereg('^HTTP/[0-9\.]+ 200 ', $data) &&
+        if (preg_match('@^HTTP@', $data) &&
+            !preg_match('@^HTTP/[0-9\.]+ 200 @', $data) &&
             !preg_match('@^HTTP/[0-9\.]+ 10[0-9]([A-Za-z ]+)?[\r\n]+HTTP/[0-9\.]+ 200@', $data))
         {
                 $errstr = substr($data, 0, strpos($data, "\n") - 1);
@@ -1831,7 +1831,7 @@ function XML_RPC_iso8601_encode($timet, $utc = 0)
 function XML_RPC_iso8601_decode($idate, $utc = 0)
 {
     $t = 0;
-    if (ereg('([0-9]{4})([0-9]{2})([0-9]{2})T([0-9]{2}):([0-9]{2}):([0-9]{2})', $idate, $regs)) {
+    if (preg_match('@([0-9]{4})([0-9]{2})([0-9]{2})T([0-9]{2}):([0-9]{2}):([0-9]{2})@', $idate, $regs)) {
         if ($utc) {
             $t = gmmktime($regs[4], $regs[5], $regs[6], $regs[2], $regs[3], $regs[1]);
         } else {
diff --git a/docs/NEWS b/docs/NEWS
index 57638a4c..4f0a372e 100644
--- a/docs/NEWS
+++ b/docs/NEWS
@@ -9,7 +9,7 @@ Version 1.5 ()
 
     * Allow to define sort order for search-results (garvinhicking)
 
-    * More PHP 5.3.0 compat (split()).
+    * More PHP 5.3.0 compat (split(), ereg(), ereg_replace()).
     
     -- beta1 release
 
diff --git a/include/functions.inc.php b/include/functions.inc.php
index 38a0a285..ad6faf23 100644
--- a/include/functions.inc.php
+++ b/include/functions.inc.php
@@ -222,7 +222,7 @@ function serendipity_fetchTemplates($dir = '') {
         return $rv;
     }
     while (($file = readdir($cdir)) !== false) {
-        if (is_dir($serendipity['serendipityPath'] . $serendipity['templatePath'] . $dir . $file) && !ereg('^(\.|CVS)', $file) && !file_exists($serendipity['serendipityPath'] . $serendipity['templatePath'] . $dir . $file . '/inactive.txt')) {
+        if (is_dir($serendipity['serendipityPath'] . $serendipity['templatePath'] . $dir . $file) && !preg_match('@^(\.|CVS)@i', $file) && !file_exists($serendipity['serendipityPath'] . $serendipity['templatePath'] . $dir . $file . '/inactive.txt')) {
             if (file_exists($serendipity['serendipityPath'] . $serendipity['templatePath'] . $dir . $file . '/info.txt')) {
                 $key = strtolower($file);
                 if (isset($rv[$key])) {