diff -ur -x '*.fasl' -x '.*' -x '*.patch' -x 'test*' -x '#*' -x 'sbcl*' ../drakma-1.1.0/cookies.lisp ./cookies.lisp
--- ../drakma-1.1.0/cookies.lisp	2009-12-01 17:06:56.000000000 -0500
+++ ./cookies.lisp	2010-04-07 11:26:32.000000000 -0400
@@ -258,6 +258,14 @@
           (push (list (car name/value) (cdr name/value) parameters) result))))
     (nreverse result)))
 
+(defvar *remove-duplicate-cookies-p* T
+  "Determines how duplicate cookies are handled.  Valid values are:
+ * nil - duplicates will not be removed
+ * (T :KEEP-LAST) - for duplicates, only the last cookie value will be kept,
+   based on the order of the response header
+ * :KEEP-FIRST - for duplicates, only the first cookie value will be kept,
+   based on the order of the response header")
+
 (defun get-cookies (headers uri)
   "Returns a list of COOKIE objects corresponding to the
 `Set-Cookie' header as found in HEADERS \(an alist as returned by
@@ -281,7 +289,13 @@
                                              (parse-cookie-date expires))
                                :domain domain
                                :securep (not (not (parameter-present-p "secure" parameters)))
-                               :http-only-p (not (not (parameter-present-p "HttpOnly" parameters))))))
+                               :http-only-p (not (not (parameter-present-p "HttpOnly" parameters))))
+		into new-cookies
+	finally (return (ccase *remove-duplicate-cookies-p*
+			  ((nil) new-cookies)
+			  ((:keep-last t) (delete-duplicates new-cookies :test #'cookie=))
+			  (:keep-first (delete-duplicates new-cookies :test #'cookie=
+							  :from-end T))))))
 
 (defun update-cookies (new-cookies cookie-jar)
   "Updates the cookies in COOKIE-JAR by replacing those which are
diff -ur -x '*.fasl' -x '.*' -x '*.patch' -x 'test*' -x '#*' -x 'sbcl*' ../drakma-1.1.0/doc/index.html ./doc/index.html
--- ../drakma-1.1.0/doc/index.html	2009-12-01 17:44:55.000000000 -0500
+++ ./doc/index.html	2010-04-07 11:29:26.000000000 -0400
@@ -86,6 +86,7 @@
           <li><a href="#delete-old-cookies"><code>delete-old-cookies</code></a>
           <li><a href="#*allow-dotless-cookie-domains-p*"><code>*allow-dotless-cookie-domains-p*</code></a>
           <li><a href="#*ignore-unparseable-cookie-dates-p*"><code>*ignore-unparseable-cookie-dates-p*</code></a>
+          <li><a href="#*remove-duplicate-cookies-p*"><code>*remove-duplicate-cookies-p*</code></a>
         </ol>
       <li><a href="#headers">Headers</a>
         <ol>
@@ -1323,6 +1324,59 @@
 
 <!-- End of entry for *IGNORE-UNPARSEABLE-COOKIE-DATES-P* -->
 
+
+<!-- Entry for *REMOVE-DUPLICATE-COOKIES-P* -->
+
+<p><br>[Special variable]<br><a class=none name='*remove-duplicate-cookies-p*'><b>*remove-duplicate-cookies-p*</b></a>
+<blockquote><br>
+Determines how duplicate cookies in the response are handled, defaults
+to <code>T</code>.  Cookies are considered duplicate using 
+<a href="#cookie="><code>COOKIE=</code></a>.
+
+Valid values are:
+<ul>
+ <li><code>NIL</code> - duplicates will not be removed</li>
+ <li><code>T</code> - for duplicates, only the last cookie value will 
+   be kept, based on the order of the response header</li>
+ <li><code>:KEEP-LAST</code> - for duplicates, only the last cookie 
+   value will be kept, based on the order of the response header</li>
+ <li><code>:KEEP-FIRST</code> - for duplicates, only the first cookie 
+   value will be kept, based on the order of the response header</li>
+</ul>
+
+Misbehaving servers may send duplicate cookies back in the same 
+<code>Set-Cookie</code> header:
+<pre>
+HTTP/1.1 200  OK
+Server: My-hand-rolled-server
+Date: Wed, 07 Apr 2010 15:12:30 GMT
+Connection: Close
+Content-Type: text/html
+Content-Length: 82
+Set-Cookie: a=1; Path=/; Secure, a=2; Path=/; Secure
+</pre>
+<p>
+In this case Drakma has to choose whether cookie "a" has the value 
+"1" or "2".  By default, Drakma will choose the last value specified, 
+in this case "2".
+</p>
+<p>
+By default, Drakma conforms to <a href="http://www.ietf.org/rfc/rfc2109.txt">RFC2109 HTTP State 
+Management Mechanism</a>, section 4.3.3 Cookie Management:
+<blockquote><em>
+If a user agent receives a Set-Cookie response header whose NAME is
+the same as a pre-existing cookie, and whose Domain and Path
+attribute values exactly (string) match those of a pre-existing
+cookie, the new cookie supersedes the old.</em>
+</blockquote>
+</p>
+
+</blockquote>
+
+<!-- End of entry for *REMOVE-DUPLICATE-COOKIES-P* -->
+
+
+
 <h4><a name="headers" class=none>Headers</a></h4>
 
 This section assembles a couple of convenience functions which can be
diff -ur -x '*.fasl' -x '.*' -x '*.patch' -x 'test*' -x '#*' -x 'sbcl*' ../drakma-1.1.0/packages.lisp ./packages.lisp
--- ../drakma-1.1.0/packages.lisp	2009-02-09 09:53:01.000000000 -0500
+++ ./packages.lisp	2010-04-07 11:32:04.000000000 -0400
@@ -36,6 +36,7 @@
   (:shadow :syntax-error :parameter-error)
   (:export :*allow-dotless-cookie-domains-p*
            :*body-format-function*
+           :*remove-duplicate-cookies-p*
            :*drakma-default-external-format*
            :*header-stream*
            :*ignore-unparseable-cookie-dates-p*
