diff --git a/rhodecode/templates/pullrequests/pullrequest.html b/rhodecode/templates/pullrequests/pullrequest.html
--- a/rhodecode/templates/pullrequests/pullrequest.html
+++ b/rhodecode/templates/pullrequests/pullrequest.html
@@ -21,9 +21,6 @@
     </div>
     ${h.form(url('pullrequest', repo_name=c.repo_name), method='post', id='pull_request_form')}
     <div style="float:left;padding:0px 30px 30px 30px">
-        <input type="hidden" name="rev_start" value="${request.GET.get('rev_start')}" />
-        <input type="hidden" name="rev_end" value="${request.GET.get('rev_end')}" />
-
         ##ORG
         <div style="float:left">
             <div>
@@ -101,7 +98,7 @@
 
             <div class="field">
                 <div class="label label-textarea">
-                    <label for="pullrequest_desc">${_('description')}:</label>
+                    <label for="pullrequest_desc">${_('Description')}:</label>
                 </div>
                 <div class="textarea text-area editor">
                     ${h.textarea('pullrequest_desc',size=30)}
@@ -125,8 +122,31 @@
 
   var other_repos_info = ${c.other_repos_info|n};
 
+  var otherrepoChanged = function(){
+      var sel_box = YUQ('#pull_request_form #other_repo')[0];
+      var repo_name = sel_box.options[sel_box.selectedIndex].value;
+
+      YUD.get('other_repo_desc').innerHTML = other_repos_info[repo_name]['description'];
+      // replace options of other_ref with the ones for the current other_repo
+      var other_ref_selector = YUD.get('other_ref');
+      var new_select = YUD.createElementFromMarkup(other_repos_info[repo_name]['revs']);
+      var new_selectedIndex = new_select.selectedIndex;
+      other_ref_selector.innerHTML = ""; // clear old options
+      while (new_select.length > 0){ // children will be popped when appened to other_ref_selector
+          other_ref_selector.appendChild(new_select.children[0]);
+      }
+      // browsers lost track of selected when appendChild was used
+      other_ref_selector.selectedIndex = new_selectedIndex;
+
+      // reset && add the reviewer based on selected repo
+      var _data = other_repos_info[repo_name];
+      YUD.get('review_members').innerHTML = '';
+      addReviewMember(_data.user.user_id, _data.user.firstname,
+                      _data.user.lastname, _data.user.username,
+                      _data.user.gravatar_link);
+  }
+
   var loadPreview = function(){
-      YUD.setStyle(YUD.get('pull_request_overview_url').parentElement,'display','none');
       //url template
       var url = "${h.url('compare_url',
                          repo_name='__other_repo__',
@@ -136,8 +156,8 @@
                          other_ref_type='__org_ref_type__',
                          other_ref='__org_ref__',
                          as_form=True,
-                         rev_start=request.GET.get('rev_start',''),
-                         rev_end=request.GET.get('rev_end',''))}";
+                         merge=True,
+                         )}";
       var org_repo = YUQ('#pull_request_form #org_repo')[0].value;
       var org_ref = YUQ('#pull_request_form #org_ref')[0].value.split(':');
 
@@ -159,22 +179,10 @@
       }
 
       YUD.get('pull_request_overview').innerHTML = "${_('Loading ...')}";
+      ypjax(url,'pull_request_overview');
+
       YUD.get('pull_request_overview_url').href = url; // shouldn't have as_form ... but ...
       YUD.setStyle(YUD.get('pull_request_overview_url').parentElement,'display','');
-      ypjax(url,'pull_request_overview', function(data){
-          var sel_box = YUQ('#pull_request_form #other_repo')[0];
-          var repo_name = sel_box.options[sel_box.selectedIndex].value;
-          var _data = other_repos_info[repo_name];
-          YUD.get('other_repo_desc').innerHTML = other_repos_info[repo_name]['description'];
-          YUD.get('other_ref').innerHTML = other_repos_info[repo_name]['revs'];
-          // select back the revision that was just compared
-          setSelectValue(YUD.get('other_ref'), rev_data['other_ref']);
-          // reset && add the reviewer based on selected repo
-          YUD.get('review_members').innerHTML = '';
-          addReviewMember(_data.user.user_id, _data.user.firstname,
-                          _data.user.lastname, _data.user.username,
-                          _data.user.gravatar_link);
-      })
   }
 
   ## refresh automatically when something changes (org_repo can't change)
@@ -184,9 +192,7 @@
   });
 
   YUE.on('other_repo', 'change', function(e){
-      var repo_name = e.currentTarget.value;
-      // replace the <select> of changed repo
-      YUD.get('other_ref').innerHTML = other_repos_info[repo_name]['revs'];
+      otherrepoChanged();
       loadPreview();
   });
 
@@ -194,8 +200,9 @@
      loadPreview();
   });
 
+  otherrepoChanged();
   //lazy load overview after 0.5s
-  setTimeout(loadPreview, 500)
+  setTimeout(loadPreview, 500);
 
 </script>