Described in this forum thread-http://www.telerik.com/community/forums/aspnet-ajax/scheduler/timeline-view-doesn-t-line-up-correctly.aspx#2764757

Hover over the command arrows on the radScheduler when the view is set to month view.  The Tooltip will display "next day" and "previous day" instead of "next month" and "previous month".

The same happens for week view.

Temporary workaround: 

<telerik:RadCodeBlock runat="server">
    <script>
        function pageLoadHandler() {
            var scheduler = $find("<%= RadScheduler1.ClientID %>");
            var $scheduler = $telerik.$(scheduler.get_element());
            var viewType = "Day";
            if (scheduler.get_selectedView() == Telerik.Web.UI.SchedulerViewType.WeekView) {
                viewType = "Week";
            } else if (scheduler.get_selectedView() == Telerik.Web.UI.SchedulerViewType.MonthView) {
                viewType = "Month";
            }

            $scheduler.find(".rsPrevDay").attr("title", "Previous " + viewType)
            $scheduler.find(".rsNextDay").attr("title", "Next " + viewType)

            // Sys.Application.remove_load(pageLoadHandler);  
        }
        Sys.Application.add_load(pageLoadHandler);
    </script>
</telerik:RadCodeBlock>

I'm using RadScheduler in a page that is called with a script "windows.open" but does not pop up. As is shown in IE6 or IE7 displays correctly but when running in IE9 is very compressed cells. In this control only use the view of "time-line" because I am trying to show the availability of people going to invite a date. Can you help me with this bug?

RADScheduler events does not align with the time columns headers on IE10.
Demo can be used to reproduce the bug on IE10, http://demos.telerik.com/aspnet-ajax/scheduler/examples/timelineview/defaultcs.aspx