media recording shows error in consle

After each media recording process, there always show error in console as follow:

This situation happen when the app is installed in to device (IOS), and then see the console in the xcode-organizer window while connecting the device with the mac computer.
Jan 11 21:10:19 unknown mediaserverd[46] : 21:10:19.780 <0x3e686ce8> AudioConverterNew returned -50
Jan 11 21:10:19 unknown mediaserverd[46] : 21:10:19.781 <0x3e686ce8> IO_ChangeIOFormat: error -50
Jan 11 21:10:19 unknown mediaserverd[46] : 21:10:19.782 <0x3e686ce8> Queue_ChangeIOFormat: failed (-50)
I am not sure if this error cause the next recording starting delay longer than normal.

Please fix it. Thanks! [import]uid: 24984 topic_id: 20263 reply_id: 320263[/import]

This is probably the iOS 5 audio recorder bug. See our latest version of the SimpleAudioRecorder example. It contains a special workaround just for iOS 5. It also contains information you need to file a bug with Apple which you need to file if you want Apple to fix this. (The workaround introduces other problems/limitations and is less than ideal.)
[import]uid: 7563 topic_id: 20263 reply_id: 79222[/import]