diff --git a/AppKit/CPObjectController.j b/AppKit/CPObjectController.j
index 82589d689..4905413e8 100644
--- a/AppKit/CPObjectController.j
+++ b/AppKit/CPObjectController.j
@@ -579,6 +579,8 @@ var CPObjectControllerContentKey                        = @"CPObjectControllerCo
 
 - (void)removeObjectAtIndex:(unsigned)anIndex
 {
+    var currentObject = [self objectAtIndex:anIndex];
+
     for (var i = 0, count = [_observationProxies count]; i < count; i++)
     {
         var proxy = [_observationProxies objectAtIndex:i],
@@ -588,7 +590,7 @@ var CPObjectControllerContentKey                        = @"CPObjectControllerCo
         if (operator)
             [self willChangeValueForKey:keyPath];
 
-        [anObject removeObserver:proxy forKeyPath:keyPath];
+        [currentObject removeObserver:proxy forKeyPath:keyPath];
 
         if (operator)
             [self didChangeValueForKey:keyPath];
@@ -777,8 +779,7 @@ var CPObjectControllerContentKey                        = @"CPObjectControllerCo
     [proxy setNotifyObject:YES];
     [_observationProxies addObject:proxy];
 
-    // We keep are reference to the observed objects
-    // because the removeObserver: will be called after the selection changes
+    // We keep a reference to the observed objects because removeObserver: will be called after the selection changes.
     var observedObjects = [_controller selectedObjects];
     _observedObjectsByKeyPath[aKeyPath] = observedObjects;
     [observedObjects addObserver:proxy forKeyPath:aKeyPath options:options context:context];
diff --git a/Tests/AppKit/CPArrayControllerTest.j b/Tests/AppKit/CPArrayControllerTest.j
index 1b676222c..08597ab64 100644
--- a/Tests/AppKit/CPArrayControllerTest.j
+++ b/Tests/AppKit/CPArrayControllerTest.j
@@ -8,6 +8,7 @@
     CPArray             _contentArray @accessors(property=contentArray);
 
     CPArray             observations;
+    int                 aCount @accessors;
 }
 
 - (CPArray)makeTestArray
@@ -289,6 +290,40 @@
     [self assertFalse:[[arrayController arrangedObjects] containsObject:objectToRemove] message:@"removed objects should no longer appear in arrangedObjects"];
 }
 
+- (void)testRemove_
+{
+    var arrayController = [self arrayController],
+        objectToRemove = [[arrayController arrangedObjects] objectAtIndex:0];
+
+    [arrayController setSelectedObjects:[objectToRemove]];
+    [arrayController remove:nil];
+
+    [self assertFalse:[[arrayController arrangedObjects] containsObject:objectToRemove] message:@"removed objects should no longer appear in arrangedObjects"];
+}
+
+- (void)testRemoveObjectsAtArrangedObjectIndexes_
+{
+    var arrayController = [self arrayController];
+
+    [arrayController removeObjectsAtArrangedObjectIndexes:[CPIndexSet indexSetWithIndexesInRange:CPMakeRange(1, 2)]];
+
+    [self assert:1 equals:[[arrayController arrangedObjects] count] message:@"objects should be removed"];
+}
+
+- (void)testRemoveObjectsAtArrangedObjectIndexes_whenObservingCount
+{
+    var arrayController = [self arrayController];
+
+    [arrayController addObserver:self forKeyPath:@"arrangedObjects.name" options:0 context:nil];
+    [self bind:@"aCount" toObject:arrayController withKeyPath:@"arrangedObjects.@count" options:nil];
+
+    // This crashed in a previous version of Cappuccino due to an error in _CPObservableArray's removeObjectAtIndex.
+    [arrayController removeObjectsAtArrangedObjectIndexes:[CPIndexSet indexSetWithIndexesInRange:CPMakeRange(1, 2)]];
+
+    [self assert:1 equals:[[arrayController arrangedObjects] count] message:@"objects should be removed"];
+    [self assert:aCount equals:[[arrayController arrangedObjects] count] message:@"count should be updated"];
+}
+
 - (void)testSelectionWhenObjectsDisappear
 {
     // If the selected object disappears during a rearrange, the selection