Index: library/Zend/Http/Client/Adapter/Curl.php
===================================================================
--- library/Zend/Http/Client/Adapter/Curl.php	(revision 3993)
+++ library/Zend/Http/Client/Adapter/Curl.php	(working copy)
@@ -351,8 +351,14 @@
         // TODO: Probably the pattern for multiple handshake requests is always the same, several HTTP codes in the response. Use that information?
         // cURL automactically handles Expect: 100-continue; and its responses. Delete the HTTP 100 CONTINUE from a response
         // because it messes up Zend_Http_Response parsing
-        if (stripos($this->_response, "HTTP/1.1 100 Continue\r\n\r\n") !== false) {
-            $this->_response = str_ireplace("HTTP/1.1 100 Continue\r\n\r\n", '', $this->_response);
+        while (0 === stripos($this->_response, "HTTP/1.1 100 Continue\r\n")) {
+            $parts = preg_split('|(?:\r?\n){2}|m', $this->_response, 2);
+
+            if (!isset($parts[1])) {
+                break;
+            }
+
+            $this->_response = array_pop($parts);
         }
 
         // cURL automatically handles Proxy rewrites, remove the "HTTP/1.0 200 Connection established" string: