diff --git a/UI/Scheduler/UIxCalView.h b/UI/Scheduler/UIxCalView.h
index 26e5e3537..e3ccebfe2 100644
--- a/UI/Scheduler/UIxCalView.h
+++ b/UI/Scheduler/UIxCalView.h
@@ -12,11 +12,13 @@
   a SOPE clientObject (which usually is an SOGoAppointmentFolder).
 */
 
-@class NSString, NSArray, NSDictionary, NSCalendarDate, SOGoAptFormatter;
+@class NSString, NSArray, NSDictionary, NSMutableDictionary, NSCalendarDate, SOGoAptFormatter;
+@class SOGoAppointmentFolder;
 
 @interface UIxCalView : UIxComponent
 {
   NSArray          *appointments;
+  NSMutableDictionary *componentsData;
   NSArray          *tasks;
   NSArray          *allDayApts;
   id               appointment;
@@ -100,6 +102,7 @@
 /* calendarUIDs */
 
 - (NSString *)formattedCalendarUIDs;
+- (SOGoAppointmentFolder *) calendarFolderForUID: (NSString *) uid;
 
 /* CSS related */
 
diff --git a/UI/Scheduler/UIxCalView.m b/UI/Scheduler/UIxCalView.m
index 7ed1b94a8..81121f25b 100644
--- a/UI/Scheduler/UIxCalView.m
+++ b/UI/Scheduler/UIxCalView.m
@@ -1,15 +1,22 @@
 // $Id: UIxCalView.m 885 2005-07-21 16:41:34Z znek $
 
-#import "UIxCalView.h"
 #import "common.h"
 //#import <OGoContentStore/OCSFolder.h>
-#import "SoObjects/Appointments/SOGoAppointmentFolder.h"
+
+#import <NGObjWeb/SoSecurityManager.h>
 #import <NGObjWeb/SoUser.h>
-#import <SOGoUI/SOGoAptFormatter.h>
 #import <NGExtensions/NGCalendarDateRange.h>
 #import <NGCards/NGCards.h>
+
+#import <SOGoUI/SOGoAptFormatter.h>
 #import "UIxComponent+Agenor.h"
 
+#import "SoObjects/Appointments/SOGoAppointmentFolder.h"
+#import <SOGo/SOGoUser.h>
+#import <SOGo/SOGoObject.h>
+
+#import "UIxCalView.h"
+
 @interface UIxCalView (PrivateAPI)
 - (NSString *) _userFolderURI;
 @end
@@ -47,12 +54,14 @@ static BOOL shouldDisplayWeekend = NO;
       privateAptTooltipFormatter
         = [[SOGoAptFormatter alloc] initWithDisplayTimeZone: tz];
       [self configureFormatters];
+      componentsData = [NSMutableDictionary new];
     }
   return self;
 }
 
 - (void) dealloc
 {
+  [componentsData release];
   [appointments               release];
   [allDayApts                 release];
   [appointment                release];
@@ -431,11 +440,85 @@ static BOOL shouldDisplayWeekend = NO;
   return [[self startDate] tomorrow];
 }
 
+- (SOGoAppointmentFolder *) calendarFolderForUID: (NSString *) uid
+{
+  SOGoFolder *upperContainer;
+  SOGoUserFolder *userFolder;
+  SOGoAppointmentFolder *calendarFolder;
+  SoSecurityManager *securityManager;
+
+  upperContainer = [[[self clientObject] container] container];
+  userFolder = [SOGoUserFolder objectWithName: uid
+                               inContainer: upperContainer];
+  calendarFolder = [SOGoAppointmentFolder objectWithName: @"Calendar"
+                                         inContainer: userFolder];
+  [calendarFolder
+    setOCSPath: [NSString stringWithFormat: @"/Users/%@/Calendar", uid]];
+  [calendarFolder setOwner: uid];
+
+  securityManager = [SoSecurityManager sharedSecurityManager];
+
+  return (([securityManager validatePermission: SoPerm_AccessContentsInformation
+                            onObject: calendarFolder
+                            inContext: context] == nil)
+          ? calendarFolder : nil);
+}
+
+- (NSArray *) activeCalendarFolders
+{
+  NSUserDefaults *ud;
+  NSEnumerator *calendarUIDs;
+  SOGoAppointmentFolder *currentFolder;
+  NSMutableArray *folders;
+  NSString *currentUID;
+
+  folders = [NSMutableArray array];
+  ud = [[context activeUser] userDefaults];
+  calendarUIDs = [[[ud stringForKey: @"calendaruids"]
+                    componentsSeparatedByString: @","] objectEnumerator];
+  currentUID = [calendarUIDs nextObject];
+  while (currentUID)
+    {
+      if (![currentUID hasPrefix: @"-"])
+        {
+          currentFolder = [self calendarFolderForUID: currentUID];
+          if (currentFolder)
+            [folders addObject: currentFolder];
+        }
+      currentUID = [calendarUIDs nextObject];
+    }
+
+  return folders;
+}
+
 - (NSArray *) _fetchCoreInfosForComponent: (NSString *) component
 {
-  return [[self clientObject] fetchCoreInfosFrom: [[self startDate] beginOfDay]
-                              to: [[self endDate] endOfDay]
-                              component: component];
+  NSArray *currentInfos;
+  NSMutableArray *infos;
+  NSEnumerator *folders;
+  SOGoAppointmentFolder *currentFolder;
+
+  infos = [componentsData objectForKey: component];
+  if (!infos)
+    {
+      infos = [NSMutableArray array];
+      folders = [[self activeCalendarFolders] objectEnumerator];
+      currentFolder = [folders nextObject];
+      while (currentFolder)
+        {
+          currentInfos = [currentFolder fetchCoreInfosFrom: [[self startDate] beginOfDay]
+                                        to: [[self endDate] endOfDay]
+                                        component: component];
+          [currentInfos makeObjectsPerform: @selector (setObject:forKey:)
+                        withObject: [currentFolder ownerInContext: nil]
+                        withObject: @"owner"];
+          [infos addObjectsFromArray: currentInfos];
+          currentFolder = [folders nextObject];
+        }
+      [componentsData setObject: infos forKey: component];
+    }
+
+  return infos;
 }
 
 - (NSArray *) fetchCoreAppointmentsInfos
diff --git a/UI/Scheduler/UIxComponentEditor.m b/UI/Scheduler/UIxComponentEditor.m
index 64cf62d76..689053f6b 100644
--- a/UI/Scheduler/UIxComponentEditor.m
+++ b/UI/Scheduler/UIxComponentEditor.m
@@ -597,12 +597,10 @@
 - (NSCalendarDate *) newStartDate
 {
   NSCalendarDate *newStartDate, *now;
-  BOOL hmSpecified;
   int hour;
 
   newStartDate = [self selectedDate];
-  hmSpecified = ([[self queryParameterForKey: @"hm"] length] > 0);
-  if (!hmSpecified)
+  if ([[self queryParameterForKey: @"hm"] length] == 0)
     {
       now = [NSCalendarDate calendarDate];
       [now setTimeZone: [[self clientObject] userTimeZone]];
diff --git a/UI/Scheduler/product.plist b/UI/Scheduler/product.plist
index 1b52a82b8..c0fdd8b38 100644
--- a/UI/Scheduler/product.plist
+++ b/UI/Scheduler/product.plist
@@ -96,7 +96,12 @@
         updateCalendars = {
           protectedBy = "View";
           pageName    = "UIxCalMainView";
-          actionName = "updateCalendars";
+          actionName  = "updateCalendars";
+        };
+        checkRights = {
+          protectedBy = "View";
+          pageName    = "UIxCalMainView";
+          actionName  = "checkRights";
         };
         freeBusyTable = {
           protectedBy = "View";
diff --git a/UI/Templates/SchedulerUI/UIxCalCalendarsListView.wox b/UI/Templates/SchedulerUI/UIxCalCalendarsListView.wox
index a1be32646..52f01c743 100644
--- a/UI/Templates/SchedulerUI/UIxCalCalendarsListView.wox
+++ b/UI/Templates/SchedulerUI/UIxCalCalendarsListView.wox
@@ -20,7 +20,6 @@
     <var:component className="UIxContactSelector"
       const:selectorId="calendarsList"
       const:hasCheckBoxes="YES"
-      const:checkBoxOnChange="return updateCalendarStatus(this);"
       colors="colors"
       contacts="contacts"
       checkedBoxes="checkedContacts"
diff --git a/UI/Templates/SchedulerUI/UIxCalMonthView.wox b/UI/Templates/SchedulerUI/UIxCalMonthView.wox
index d0f07ceb7..4d6578bb1 100644
--- a/UI/Templates/SchedulerUI/UIxCalMonthView.wox
+++ b/UI/Templates/SchedulerUI/UIxCalMonthView.wox
@@ -82,6 +82,7 @@
             <var:foreach list="currentRangeOf7Days" item="currentTableDay"
               ><td var:class="dayCellClasses"
                 var:day="currentTableDay.shortDateString"
+                const:hour="0800"
                 ><div class="dayContent"><span class="dayCellLabel"
                   ><var:string value="labelForCurrentDayCell" /></span
                   ><br /><var:foreach
diff --git a/UI/WebServerResources/SchedulerUI.css b/UI/WebServerResources/SchedulerUI.css
index 9c56599bc..8947cae94 100644
--- a/UI/WebServerResources/SchedulerUI.css
+++ b/UI/WebServerResources/SchedulerUI.css
@@ -56,6 +56,14 @@ UL#tasksList, UL#uixselector-calendarsList-display
   list-style-type: none;
   list-style-image: none; }
 
+UL#uixselector-calendarsList-display
+{ height: 10.5em;
+  margin: 0px; }
+
+UL#uixselector-calendarsList-display LI.denied
+{ background: #f00;
+  color: #000; }
+
 UL#tasksList
 { position: absolute;
   width: 100%;
@@ -64,10 +72,6 @@ UL#tasksList
   right: .25em;
   bottom: .25em; }
 
-UL#uixselector-calendarsList-display
-{ height: 10.5em;
-  margin: 0px; }
-
 UL#tasksList LI
 { white-space: nowrap; }
 
diff --git a/UI/WebServerResources/SchedulerUI.js b/UI/WebServerResources/SchedulerUI.js
index 10df777ad..21bd2a8a0 100644
--- a/UI/WebServerResources/SchedulerUI.js
+++ b/UI/WebServerResources/SchedulerUI.js
@@ -2,7 +2,6 @@ var sortOrder = '';
 var sortKey = '';
 var listFilter = 'view_today';
 
-var CalendarBaseURL = ApplicationBaseURL;
 var listOfSelection = null;
 
 var hideCompletedTasks = 0;
@@ -305,19 +304,6 @@ function tasksListCallback(http)
     log ("ajax fuckage");
 }
 
-function calendarsListCallback(http)
-{
-//   var div = $("calendarSelectorView");
-
-  if (http.readyState == 4
-      && http.status == 200) {
-//     document.calendarsListAjaxRequest = null;
-//     div.innerHTML = http.responseText;
-  }
-  else
-    log ("ajax fuckage");
-}
-
 function restoreCurrentDaySelection(div)
 {
   var elements = div.getElementsByTagName("a");
@@ -375,7 +361,7 @@ function changeDateSelectorDisplay(day, keepCurrentDay)
 
 function changeCalendarDisplay(time, newView)
 {
-  var url = CalendarBaseURL + ((newView) ? newView : currentView);
+  var url = ApplicationBaseURL + ((newView) ? newView : currentView);
 
   var day = null;
   var hour = null;
@@ -533,15 +519,15 @@ function popupCalendar(node)
 
 function onAppointmentContextMenu(event, element)
 {
-  var topNode = $('appointmentsList');
+  var topNode = $("appointmentsList");
 //   log(topNode);
 
-  var menu = $('appointmentsListMenu');
+  var menu = $("appointmentsListMenu");
 
   menu.addEventListener("hideMenu", onAppointmentContextMenuHide, false);
-  onMenuClick(event, 'appointmentsListMenu');
+  onMenuClick(event, "appointmentsListMenu");
 
-  var topNode = $('appointmentsList');
+  var topNode = $("appointmentsList");
   var selectedNodes = topNode.getSelectedRows();
   topNode.menuSelectedRows = selectedNodes;
   for (var i = 0; i < selectedNodes.length; i++)
@@ -553,7 +539,7 @@ function onAppointmentContextMenu(event, element)
 
 function onAppointmentContextMenuHide(event)
 {
-  var topNode = $('appointmentsList');
+  var topNode = $("appointmentsList");
 
   if (topNode.menuSelectedEntry) {
     deselectNode(topNode.menuSelectedEntry);
@@ -586,7 +572,7 @@ function _loadAppointmentHref(href) {
     document.appointmentsListAjaxRequest.aborted = true;
     document.appointmentsListAjaxRequest.abort();
   }
-  var url = CalendarBaseURL + href;
+  var url = ApplicationBaseURL + href;
   document.appointmentsListAjaxRequest
     = triggerAjaxRequest(url, appointmentsListCallback, href);
 
@@ -598,7 +584,7 @@ function _loadTasksHref(href) {
     document.tasksListAjaxRequest.aborted = true;
     document.tasksListAjaxRequest.abort();
   }
-  url = CalendarBaseURL + href;
+  url = ApplicationBaseURL + href;
 
   var selectedIds = $("tasksList").getSelectedNodesId();
   document.tasksListAjaxRequest
@@ -864,13 +850,13 @@ function updateCalendarStatus()
     list.push(nodes[0].getAttribute("uid"));
     nodes[0].childNodesWithTag("input")[0].checked = true;
   }
-  CalendarBaseURL = (UserFolderURL + "Groups/_custom_"
-                     + list.join(",") + "/Calendar/");
+//   ApplicationBaseURL = (UserFolderURL + "Groups/_custom_"
+//                      + list.join(",") + "/Calendar/");
 
+  updateCalendarsList();
   refreshAppointments();
   refreshTasks();
   changeCalendarDisplay();
-  updateCalendarsList();
 
   return false;
 }
@@ -939,15 +925,20 @@ function updateCalendarsList(method)
     document.calendarsListAjaxRequest.aborted = true;
     document.calendarsListAjaxRequest.abort();
   }
-  document.calendarsListAjaxRequest
-    = triggerAjaxRequest(url, calendarsListCallback);
-  if (method == "removal")
-    updateCalendarStatus();
+  var http = createHTTPClient();
+  if (http) {
+    http.url = url;
+    http.open("GET", url, false);
+    http.send("");
+
+    if (method == "removal")
+      updateCalendarStatus();
+  }
 }
 
 function addContact(tag, fullContactName, contactId, contactName, contactEmail)
 {
-  var uids = $('uixselector-calendarsList-uidList');
+  var uids = $("uixselector-calendarsList-uidList");
 //   log("addContact");
   if (contactId)
     {
@@ -960,22 +951,22 @@ function addContact(tag, fullContactName, contactId, contactName, contactEmail)
           else
             uids.value = contactId;
           var names = $('uixselector-calendarsList-display');
-          var listElems = names.childNodesWithTag("li");
-          var colorDef = indexColor(listElems.length);
           names.innerHTML += ('<li onmousedown="return false;"'
                               + ' uid="' + contactId + '"'
                               + ' onclick="onRowClick(event);">'
                               + ' <span class="colorBox"'
                               + ' style="background-color: '
                               + colorDef + ';"></span>'
-                              + ' <input class="checkBox" type="checkbox"'
-                              + ' onchange="return updateCalendarStatus(this);"'
-                              + ' />'
+                              + ' <input class="checkBox" type="checkbox" />'
                               + contactName + '</li>');
+          var listElems = names.childNodesWithTag("li");
+          var input = listElems.childNodesWithTag("input")[0];
+          input.addEventListener("change", updateCalendarStatus, false);
 
           var styles = document.getElementsByTagName("style");
           styles[0].innerHTML += ('.ownerIs' + contactId + ' {'
-                                  + ' background-color: ' + colorDef
+                                  + ' background-color: '
+                                  + indexColor(listElems.length - 1)
                                   + ' !important; }');
         }
     }
@@ -1060,6 +1051,37 @@ function initCalendarContactsSelector() {
   inhibitMyCalendarEntry();
   updateCalendarStatus();
   selector.changeNotification = updateCalendarsList;
+
+  var rights;
+  var http = createHTTPClient();
+  if (http) {
+//     log ("url: " + url);
+    // TODO: add parameter to signal that we are only interested in OK
+    http.url = ApplicationBaseURL + "checkRights";
+    http.open("GET", http.url, false /* not async */);
+    http.send("");
+    if (http.status == 200
+        && http.responseText.length > 0)
+      rights = http.responseText.split(",");
+  }
+
+  var list = $("uixselector-calendarsList-display").childNodesWithTag("li");
+  for (var i = 0; i < list.length; i++) {
+    var input = list[i].childNodesWithTag("input")[0];
+    if (rights) {
+      if (rights[i] == "1") {
+        input.addEventListener("change", updateCalendarStatus, false);
+        list[i].removeClassName("denied");
+      }
+      else {
+        input.checked = false;
+        input.disabled = true;
+        list[i].addClassName("denied");
+      }
+    } else {
+      input.addEventListener("change", updateCalendarStatus, false);
+    }
+  }
 }
 
 function initCalendars() {