Unable to edit existing default "Unknown Location" nor able to add new Location.

Version: 1.9.0 SNAPSHOT Build 18746
When tried to edit existing default location got the following error :
An error has occurred!
The following error happened somewhere on this page:
javax.servlet.jsp.JspException: org.springframework.beans.NotReadablePropertyException: Invalid property 'startDate' of bean class [org.openmrs.Location]: Bean property 'startDate' is not readable or has an invalid getter method: Does the return type of the getter match the parameter type of the setter?

(The full error stack trace output is in the source of this page.)

Snapshot of corresponding error dump in log :

ERROR - RequestContextAwareTag.doStartTag(86) |2011-03-18 22:43:33,985| Invalid property 'startDate' of bean class [org.openmrs.Location]: Bean property 'startDate' is not readable or has an invalid getter method: Does the return type of the getter match the parameter type of the setter?
org.springframework.beans.NotReadablePropertyException: Invalid property 'startDate' of bean class [org.openmrs.Location]: Bean property 'startDate' is not readable or has an invalid getter method: Does the return type of the getter match the parameter type of the setter?
at org.springframework.beans.BeanWrapperImpl.getPropertyValue(BeanWrapperImpl.java:674)
at org.springframework.beans.BeanWrapperImpl.getPropertyValue(BeanWrapperImpl.java:666)
at org.springframework.validation.AbstractPropertyBindingResult.getActualFieldValue(AbstractPropertyBindingResult.java:96)
at org.springframework.validation.AbstractBindingResult.getFieldValue(AbstractBindingResult.java:224)
at org.springframework.web.servlet.support.BindStatus.<init>(BindStatus.java:120)
at org.springframework.web.servlet.tags.BindTag.doStartTagInternal(BindTag.java:119)
at org.springframework.web.servlet.tags.RequestContextAwareTag.doStartTag(RequestContextAwareTag.java:79)
at org.apache.jsp.WEB_002dINF.view.portlets.addressLayout_jsp._jspService(addressLayout_jsp.java:970)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:386)
...