To update the location of a GPS indicator on mapView... [mapView removeAnnotation:myGpsAnnotation]; [myGpsAnnotation release]; myGpsAnnotation = nil; myGpsAnnotation = [[MapLocationAnnotation alloc] initWithCoordinate:region.center annotationType:MapAnnotationTypeGps title:MAP_ANNOTATION_TYPE_GPS]; [mapView addAnnotation:myGpsAnnotation]; ...I see net memory slowly climbing in Instruments (simulator). No "Leak" blip, but "Net Bytes" and "# Net" slowly incrementing... unless this code is commented out. So I'm 100% certain this is the offending code. BUT if I do the following... [mapView removeAnnotation:myGpsAnnotation]; [myGpsAnnotation release]; myGpsAnnotation = nil; myGpsAnnotation = [[MapLocationAnnotation alloc] initWithCoordinate:region.center annotationType:MapAnnotationTypeGps title:MAP_ANNOTATION_TYPE_GPS]; [mapView addAnnotation:myGpsAnnotation]; [mapView removeAnnotation:myGpsAnnotation]; [mapView addAnnotation:myGpsAnnotation]; [mapView removeAnnotation:myGpsAnnotation]; [mapView addAnnotation:myGpsAnnotation]; ...then the "Net Bytes" and "# Net" increase much faster. Is it possible this isn't my mistake, and I'm trying to track down a leak in MapKit? Am I really leaking memory? Again, nothing appears under "Leaks", but then I don't see why Net values would be continually climbing. Thanks for any help, -Gord