Index: wp-includes/class-IXR.php
===================================================================
--- wp-includes/class-IXR.php	(revision 13065)
+++ wp-includes/class-IXR.php	(working copy)
@@ -581,7 +581,7 @@
                 $gettingHeaders = false;
             }
             if (!$gettingHeaders) {
-                $contents .= trim($line);
+                $contents .= $line;
             }
             if ($this->debug) {
                 $debug_contents .= $line;