I'm fairly new to Cocoa and Objective-C. Currently I'm developing a fairly basic application to test my knowledge and put some of the stuff I've been reading about into practice. Everything is working, but Leaks reports a number of issues. 

None of these leaks seems to be directly applicable to code that I've written (I have read and tried to follow Apple's rules on memory allocation). Currently my project makes use of Garbage Collection and I'm developing on Snow Leopard. Running [AnalysisTool](http://www.karppinen.fi/analysistool/) finds no issues with my code (aside from a few naming convention warnings).

Currently my application makes use of an NSTableView which I have hooked up to an NSArrayController. Interacting with the NSTableView seems to cause leaks to report issues (actions such as sorting table columns and other standard user interaction). This leads me to believe that my use of the NSArrayController (and my implementation of its content source) is to blame. 

Currently the NSArrayController receives its content from an NSMutableArray (timers) handled in my Application's delegate like so:

```
- (id) init
{
    if (self = [super init])
    {
        timers = [NSMutableArray array];    
    }
    return self;
}
- (void) dealloc
{
    [timers release];
    [super dealloc];
}

```

Within Interface Builder my NSArrayController has its Object Controller set to the Timing class, which is defined below:

```
@interface Timing : NSObject {
    NSString *desc;
    NSDate *timestamp;
    bool active;
}
@end

@implementation Timing
-(id) init
{
    if (self = [super init])
    {
        desc = @"New timing";
        timestamp = [[NSDate alloc] init];
        active = false;
    }
    return self;
}
-(void) dealloc
{
    [timestamp release];
    [super dealloc];
}
@end

```

I've used standard Cocoa bindings to hook up Add and Remove buttons to manipulate the TableView and these seem to work correctly (clicking Add will create a row in the TableView with the value of 'New timing', for instance).

Leaks reports that the libraries responsible are AppKit and CoreGraphics. Although, honestly, I'm still new to the Leaks tool - so I could be reading its output incorrectly. If it helps, I've placed a screenshot of its output [here](http://nial.me/leaks.png). If anyone could point me in the right direction, that would really be appreciated.

As an aside, I've also been experimenting with manually adding objects to the timers array without the use of Cocoa bindings. Here's what I came up with:

```
Timing *timingInstance = [[Timing alloc] init];
[timers addObject:timingInstance];
[timingInstance release];

[timersController setContent:timers];
[timersTableView reloadData];

```

Again, this seems to work, but I thought it best to ask the experts!