I tried some stuff with dealloc and the warning but I found out something that I can not remember right now. I believe that it had todo something with the order of dealloc and calling removeObserver.

If you find a solution please clone my github repo and I will merge it into master.

Does “leak on the property observer” you are talking about does concern the fact that you never remove the observer from the annotations view ? If so, maybe this solution would fit:

When you create MyAnnotationView objects, add them to to a NSMutableArray list. Then, in dealloc, do:
for (annotations id in list)
[annotation removeObserver:self forKeyPath:@"selected"];

Do you think this would solve the problem ?

By the way, I have a question: where have you gathered the information to write this line:
[UIView beginAnimations: @"moveCNGCallout" context: nil];
in particular, the “moveCNGCallout” thing ?

Thanks a lot, your tutorial is helpful

//CGPoint notNear = CGPointMake(10000.0,10000.0);
//annView.calloutOffset = notNear;

…

[annotationView setCanShowCallout:NO];