Reproducing Date serialization issue - controller

gistfile1.java

public with sharing class DateIssueRepro {
	// controller for testing Date setting issue ( case 08471144 )
	// 2012-12-09 Jeff Trull <jetrull@sbcglobal.net>
	public        String  selectedSer { get; set; }  // only needed to set default
	
	public DateIssueRepro() {
		// initialize serialization method
		selectedSer = 'none';		
	}
	
	@RemoteAction public static
	void updateContact( Contact ct ) {
		System.debug('SObject processor: received date: ' + String.valueOf(ct.Birthdate));
	}
	@RemoteAction public static
	void updateDate(    Date    dt ) {
		System.debug('Plain Date processor: received date: ' + String.valueOf(dt));
	}
}