I see a similar, unanswered question for iphone. I'm running on Android. In both the simulator and on my Droid, attempting to remove a map annotation crashes the app.

var theAnno;
var mapview_event = mapview.addEventListener('click', function(e) {
    if(e.clicksource == 'rightButton') {
        saleID = e.annotation.myid;
        theAnno = e.annotation;
        // open options dialog
        dialog.show();
    }
});
...
// later, within the options dialog event listener
// I'm using:
if(theAnno != null) mapview.deselectAnnotation(theAnno);
// which crashes

I've also tried by using the annotation's title. So, theAnno = e.annotation.title but in my app, the titles could in theory be duplicated or maybe even empty strings. The API docs says that deselectAnnotation accepts either an annotation object or a title. Neither works for me though.

Any suggestions?