If you set enableManualInput="true" in a rich:calendar, you get a NullPointerException :

Caused by: java.lang.NullPointerException
	at org.richfaces.renderkit.html.CalendarRenderer.convertToBoolean(CalendarRenderer.java:112) [richfaces-components-ui-4.3.0-SNAPSHOT.jar:4.3.0-SNAPSHOT]
	at org.richfaces.renderkit.html.CalendarRenderer.doEncodeEnd(CalendarRenderer.java:270) [richfaces-components-ui-4.3.0-SNAPSHOT.jar:4.3.0-SNAPSHOT]
	at org.richfaces.renderkit.RendererBase.encodeEnd(RendererBase.java:175) [richfaces-components-ui-4.3.0-SNAPSHOT.jar:4.3.0-SNAPSHOT]

Searching a bit, it seems it looks for a "readonly" attribute : see https://github.com/richfaces/components/blob/develop/input/ui/src/main/templates/calendar.template.xml#L39 , there is a component.attributes['readonly'] but on last VDL of calendar ( http://docs.jboss.org/richfaces/latest_4_X/vdldoc/rich/calendar.html ), there is no "readonly" attribute and I couldn't find any in RichFaces component Java code neither.

So my guess would be :

• if enableManualInput="false", then the test at line 270 of CalendarRenderer ends and all works fine
• if enableManualInput="true", then the same test try to convert "readonly" attribute to boolean, but since it doesn't exist, it tries to convert a null value and bim, NPE !