If you handle the DayRender event for a calendar control and add an HTML element with a title - the rendered HTML operates properly on IE but theTitle tooltip fails to display in FireFox.

I've tried this with all types of tags (b, p, ...) that have a title and hence a tooltip - all work on IE - none work on FireFox.

The event handler code looks like:
protected void Calendar1_DayRender(object sender, EO.Web.DayRenderEventArgs drea)
{
drea.Writer.WriteBeginTag("b");
drea.Writer.WriteAttribute("title", "tooltip should display on hover");
drea.Writer.Write(HtmlTextWriter.TagRightChar);
drea.Writer.Write(drea.Day.DayNumberText);
drea.Writer.WriteEndTag("b");
}