if (annotation == theMap.userLocation)
    return nil;

2012-02-01 20:43:47.527 AusReefNSW[27178:11603] -[MKUserLocationView setPinColor:]: unrecognized selector sent to instance 0x79b0720
2012-02-01 20:43:47.528 AusReefNSW[27178:11603] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[MKUserLocationView setPinColor:]: unrecognized selector sent to instance 0x79b0720'
*** First throw call stack:

- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKPinAnnotationView *)view
{
 theAnnotationSelected = [[mapView selectedAnnotations] objectAtIndex:0];
if ([theAnnotationSelected isKindOfClass:[MyAnnotation class]] )
{
view.pinColor = MKPinAnnotationColorGreen;

}
- (void)mapView:(MKMapView *)mapView didDeselectAnnotationView:(MKPinAnnotationView *)view
{
if ([theAnnotationSelected isKindOfClass:[MyAnnotation class]] )
{
view.pinColor = MKPinAnnotationColorRed;
}

-(MKAnnotationView *)mapView:(MKMapView *)pmapView viewForAnnotation:(id <MKAnnotation>)annotation
{
    if ([annotation isKindOfClass:[MKUserLocation class]])
        return nil;  //return nil to use default blue dot view

    if([annotation isKindOfClass:[MKAnnotationClass class]])
    {
        //Your code
    }
}

- (void)mapView:(MKMapView *)mapView1 didSelectAnnotationView:(MKAnnotationView *)customAnnotationView
{

    if(![annotation isKindOfClass:[MKUserLocation class]])
    {
          //Your code
    }

}

-(void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view{

id *annotation = view.annotation;
    if (![annotation isKindOfClass:[MKUserLocation class]]) {
//Normal Code here
}

- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view {

if([view.annotation isKindOfClass:[SpecialClass class]]){

    SpecialClass *cluster = (SpecialClass *)view.annotation;
    if(testCriteria){
        [self.mapView setRegion:MKCoordinateRegionMakeWithDistance(cluster.coordinate, cluster.radius, cluster.radius) animated:YES];
    }
}

-(void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view{
id annotation = view.annotation;
    if (![annotation isKindOfClass:[MKUserLocation class]]) {
//Your Annotation Code here
}
}