CFNetwork Memory Leak?

[MatthewD]

I am attempting to use NSURLConnection to talk to a device that supports HTTP. It works great, but I noticed there are occasional memory leaks when using the Leak instrument. I have a RequestHelper class that has its own secondary thread. The secondary thread is there to parse and process the data when it arrives from the URLConnection. Here is the stack trace I get for the leak:

EDIT: I have also tried removed the secondary thread and created the connection in the main thread with the same results.

  20 libSystem.B.dylib thread_assign_default
  19 libSystem.B.dylib _pthread_start
  18 Foundation __NSThread__main__
  17 Foundation -[NSThread main]
  16 Server Control -[RequestHelper backgroundThread:] /.../Server Control/Classes/RequestHelper.m:593
  15 CoreFoundation CFRunLoopRunInMode
  14 CoreFoundation CFRunLoopRunSpecific
  13 CFNetwork MultiplexerSource::_perform(void*)
  12 CFNetwork MultiplexerSource::perform()
  11 CFNetwork URLConnection::multiplexerClientPerform(RunLoopMultiplexer*)
  10 CFNetwork URLConnectionClient::processEvents()
   9 CFNetwork URLConnectionClient::ClientConnectionEventQueue::processAllEventsAndConsumePayload(XConnectionEventInfo<XClientEvent, XClientEventParams>*, long)
   8 CFNetwork URLConnectionClient::_clientWillSendRequest(_CFURLRequest const*, _CFURLResponse*, URLConnectionClient::ClientConnectionEventQueue*)
   7 CFNetwork URLConnectionClient::getRequestForTransmission(_CFURLResponse*, _CFURLRequest const*, __CFError**)
   6 CFNetwork URLConnectionLoader::copyProtocolCanonicalRequest()
   5 CFNetwork HTTPProtocol::copyCanonicalRequest()
   4 CFNetwork HTTPProtocol::_createCanonicalRequest(__CFAllocator const*, _CFURLRequest const*, void const*)
   3 CFNetwork HTTPProtocol::_createMutableCanonicalRequest(__CFAllocator const*, _CFURLRequest const*, void const*)
   2 CFNetwork createCanonicalURL
   1 CoreFoundation CFAllocatorAllocate
   0 CoreFoundation __CFAllocatorSystemAllocate

Now, I've been pretty frustrated trying to figure this out, so I created a stripped down, basic version of the URLConnection class with similar methods and the same delegate methods (Basically, just a TCPClient that parses the response and the content). When replacing my version of the URLConnection into RequestHelper class and changing nothing else, I no longer have any leaks. I really don't want to use the stripped down version because I think it's a waste of time to reinvent the wheel.

This is what is on line 593 in the RequestHelper class:

RequestHelper.m Line 593:
SInt32 result = CFRunLoopRunInMode(kCFRunLoopDefaultMode, 10, YES);

Any thoughts?

Thanks,
Matt