asihttprequest вызывает сбой моего приложения

У меня есть приложение на основе навигации. Нажимаю кнопку в главном представлении, затем я нажимаю новый вид на контроллер навигации. Все довольно простые вещи.

Когда новое представление загружено, я выполняю ASIHTTPRequest для получения некоторых данных json, которые представляют собой список URL-адресов изображений. Then I do a for loop, create a bunch of ASIHTTPRequests, add them to a queue and then run the queue.

But if I click on the back button before the queue is finished, the app crashes, this app displays houses and lets say you pick the wrong house, click back very quickly, before any photo is displayed, bumm crash.

This thread http://groups.google.com/group/asihttprequest/browse_thread/thread/3d4815198aa889b9 explains my problem real well, except I do cancel all requests on view did unload, set delegate to nil and release the queue.

Still I crash. I crash pretty much every time if I use 3G, but on wifi it is real hard to make it crash, but quite doable.

In almost 80% instances the debugger jumps to this line in ASIHTTPRequest.m

(void)requestReceivedResponseHeaders:(NSMutableDictionary *)newResponseHeaders { 
  if ([self error] || [self mainRequest]) { return; }  
--> if (delegate && [delegate respondsToSelector:didReceiveResponseHeadersSelector]) {

Many many cases it jumps to :

(void)requestReceivedResponseHeaders:(NSMutableDictionary *)newResponseHeaders { 
  if ([self error] || [self mainRequest]) { return; }    
---> if (delegate && [delegate respondsToSelector:didReceiveResponseHeadersSelector]) {  

Ad in a handful of instances it goes to my main loop

int main(int argc, char *argv[]) {  
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; 
--> int retVal = UIApplicationMain(argc, argv, nil, nil); with SIGBART error [pool release]; return retVal;  

I am using MBP and MacPro, latest OS X, Xcode 4.0.2 and I test on all apple devices except original iPhones.

I really don't want to re-write my whole app, but is there anything else out there that compares with ASIHTTPRequest ?