The following method shows up as leaking while performing a memory-leaks test with Instruments:

- (NSDictionary*) initSigTrkLstWithNiv:(int)pm_SigTrkNiv SigTrkSig:(int)pm_SigTrkSig SigResIdt:(int)pm_SigResIdt SigResVal:(int)pm_SigResVal {
 NSArray *objectArray;
 NSArray *keyArray;
 if (self = [super init]) {
  self.SigTrkNiv = [NSNumber numberWithInt:pm_SigTrkNiv];
  self.SigTrkSig = [NSNumber numberWithInt:pm_SigTrkSig];
  self.SigResIdt = [NSNumber numberWithInt:pm_SigResIdt];
  self.SigResVal = [NSNumber numberWithInt:pm_SigResVal];

  objectArray = [NSArray arrayWithObjects:SigTrkNiv,SigTrkSig,SigResIdt,SigResVal, nil];
  keyArray = [NSArray arrayWithObjects:@"SigTrkNiv", @"SigTrkSig", @"SigResIdt", @"SigResVal", nil];

  self = [NSDictionary dictionaryWithObjects:objectArray forKeys:keyArray];
 }
 return self;
}

code that invokes the instance:

   NSDictionary *lv_SigTrkLst = [[SigTrkLst alloc]initSigTrkLstWithNiv:[[tempDict objectForKey:@"SigTrkNiv"] intValue]
             SigTrkSig:[[tempDict objectForKey:@"SigTrkSig"]  intValue]
             SigResIdt:[[tempDict objectForKey:@"SigResIdt"]  intValue]
             SigResVal:[[tempDict objectForKey:@"SigResVal"]  intValue]];  
[[QBDataContainer sharedDataContainer].SigTrkLstArray addObject:lv_SigTrkLst];  
[lv_SigTrkLst release];

Instruments informs that 'SigTrkLst' is leaking. Even though I have released the instance? (I know that adding it to the array increments the retainCount by 1 but releasing it twice removes it from the array?)