Index: trunk/src/org/openstreetmap/josm/data/oauth/OAuthParameters.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/oauth/OAuthParameters.java	(revision 3424)
+++ trunk/src/org/openstreetmap/josm/data/oauth/OAuthParameters.java	(revision 3425)
@@ -6,5 +6,5 @@
 import oauth.signpost.basic.DefaultOAuthConsumer;
 import oauth.signpost.basic.DefaultOAuthProvider;
-import oauth.signpost.signature.SignatureMethod;
+import oauth.signpost.signature.HmacSha1MessageSigner;
 
 import org.openstreetmap.josm.data.Preferences;
@@ -134,5 +134,6 @@
      */
     public OAuthConsumer buildConsumer() {
-        return new DefaultOAuthConsumer(consumerKey, consumerSecret, SignatureMethod.HMAC_SHA1);
+        OAuthConsumer consumer = new DefaultOAuthConsumer(consumerKey, consumerSecret);
+        return consumer;
     }
 
@@ -147,5 +148,4 @@
         CheckParameterUtil.ensureParameterNotNull(consumer, "consumer");
         return new DefaultOAuthProvider(
-                consumer,
                 requestTokenUrl,
                 accessTokenUrl,
Index: trunk/src/org/openstreetmap/josm/gui/oauth/OsmOAuthAuthorizationClient.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/oauth/OsmOAuthAuthorizationClient.java	(revision 3424)
+++ trunk/src/org/openstreetmap/josm/gui/oauth/OsmOAuthAuthorizationClient.java	(revision 3425)
@@ -130,5 +130,5 @@
             monitor.beginTask("");
             monitor.indeterminateSubTask(tr("Retrieving OAuth Request Token from ''{0}''", oauthProviderParameters.getRequestTokenUrl()));
-            provider.retrieveRequestToken(null);
+            provider.retrieveRequestToken(consumer, null);
             return OAuthToken.createToken(consumer);
         } catch(OAuthCommunicationException e){
@@ -163,5 +163,5 @@
             monitor.beginTask("");
             monitor.indeterminateSubTask(tr("Retrieving OAuth Access Token from ''{0}''", oauthProviderParameters.getAccessTokenUrl()));
-            provider.retrieveAccessToken(null);
+            provider.retrieveAccessToken(consumer, null);
             return OAuthToken.createToken(consumer);
         } catch(OAuthCommunicationException e){