Memory leak from NSTimer? -

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i'm developing app , , running well. not enough, though. when running "leaks" instrument, i'm seeing lot of leaks nstimer.

the nstimer started , stopped uiswitch. memory leak occurs each time switch flipped "off"

//playview.h @interface playview : uiviewcontroller {   nstimer *autotimer;      // other things }  @property (nonatomic, retain) nstimer *autotimer; // etc...   //playview.m #import "playview.h" @implementation playview @synthesize autotimer;     - (ibaction) toggleenabledforswitch1: (id) sender {       if (switch1.on) {         self.autotimer = [nstimer scheduledtimerwithtimeinterval:0.5                 target:self                 selector:@selector(updatecounter:)                 userinfo:nil                 repeats:yes];      }      else {         restart = 1;         [self.autotimer invalidate];         self.autotimer = nil;            [self.autotimer release];     } }   - (void)updatecounter:(nstimer *)thetimer {   // bunch of stuff }

what causing this? i'm must simple , i'm missing it...


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