Why was the default constructor for DelegatingVariableResolver changed? (ZK 5.0.3)

public DelegatingVariableResolver() {
		final Configuration conf = Executions.getCurrent().getDesktop()
				.getWebApp().getConfiguration();
		final String value = conf.getPreference("org.zkoss.spring.VariableResolver",
				null);
		if (value != null) {
			String[] vrClss = value.split(",");
			for (int i = 0; i < vrClss.length; i++) {
				try {
					Object o = Classes.newInstanceByThread(vrClss<i >);
					if(!_variableResolvers.contains(o)) {
						_variableResolvers.add(o);
					}
				} catch (Exception e) {
					// do nothing
				}
			}
		} else {
			_variableResolvers.add(new DefaultDelegatingVariableResolver());
		}

	}

public class DelegatingVariableResolverSerializableUiFactory 
	extends SimpleUiFactory {

	private static final String SECURITY_TLD_URL = "";
	
	private final FunctionMapper functionMapper;
	private final VariableResolver variableResolver;

	public DelegatingVariableResolverSerializableUiFactory() throws XelException, MalformedURLException {
		// init taglibMapper
		TaglibMapper taglibMapper = new TaglibMapper();
		taglibMapper.load("sec", new URL(SECURITY_TLD_URL));
		functionMapper = taglibMapper;
		
		// init VariableResolver
		variableResolver = new DelegatingVariableResolver();
	}

        // more methods here...
}

public DelegatingVariableResolver() {
		Configuration conf = null;
		String value = null;

                try {
                          conf = Executions.getCurrent().getDesktop()
				.getWebApp().getConfiguration();
		          value = conf.getPreference("org.zkoss.spring.VariableResolver",
				null);
                } catch (Exception e) {
                   // error handling
                }

                ...
}