i built groovy with the available sources and changed Lowtide.app to AppleTV.app for iOS 4.2.1 support.
Jan 22 23:13:05 AppleTV AppleTV[98]: media URL http://stream57-he.grooveshark.com/stream.php?streamKey=blabla
Jan 22 23:13:07 AppleTV AppleTV[98]: -[NSNull intValue]: unrecognized selector sent to instance 0x3e814364
Jan 22 23:13:07 AppleTV AppleTV[98]: *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSNull intValue]: unrecognized selector sent to instance 0x3e814364'
*** Call stack at first throw:
(
0 CoreFoundation 0x34094987 __exceptionPreprocess + 114
1 libobjc.A.dylib 0x313c549d objc_exception_throw + 24
2 CoreFoundation 0x34096133 -[NSObject(NSObject) doesNotRecognizeSelector:] + 102
3 CoreFoundation 0x3403daa9 ___forwarding___ + 508
4 CoreFoundation 0x3403d860 _CF_forwarding_prep_0 + 48
5 Groovy 0x00704114 0x0 + 7356692
6 BackRow 0x32d8aebf -[BRMusicNowPlayingControl(Updates) _updateTrackWithTransition:] + 134
7 BackRow 0x32d8ba85 -[BRMusicNowPlayingControl controlWasActivated] + 120
8 BackRow 0x32da22f5 -[BRControl(TreeUtilities) _insertSingleControl:atIndex:] + 340
9 BackRow 0x32da2b99 -[BRControl(BRControlHierarchy) setControls:] + 172
10 BackRow 0x32d93c67 -[BRMediaPlayerController(ControlManagement) _updatePlaybackControls] + 334
11 BackRow 0x32d9434d -[BRMediaPlayerController(StateManagement) _enterPlaybackStatePlaying:] + 28
12 BackRow 0x32d949f9 -[BRMediaPlayerController(StateManagement) _enterResumeMenuState] + 1060
13 BackRow 0x32d929f9 -[BRMediaPlayerController(PlayerNotifications) _playerMediaCued:] + 60
14 Foundation 0x33bf2623 _nsnote_callback + 142
15 CoreFoundation 0x3401b123 __CFXNotificationPost_old + 402
16 CoreFoundation 0x3401adc3 _CFXNotificationPostNotification + 118
17 Foundation 0x33be8f8b -[NSNotificationCenter postNotification:] + 138
18 Foundation 0x33c57987 postQueueNotifications + 246
19 Foundation 0x33c57b35 __NSPostASAPQueueNotes + 12
20 CoreFoundation 0x34024c59 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 16
21 CoreFoundation 0x34024acd __CFRunLoopDoObservers + 412
22 CoreFoundation 0x3401c07b __CFRunLoopRun + 774
23 CoreFoundation 0x3401bc87 CFRunLoopRunSpecific + 230
24 CoreFoundation 0x3401bb8f CFRunLoopRunInMode + 58
25 BackRow 0x32dfab1b -[BRApplication(Private) _run] + 222
26 BackRow 0x32dfb015 BRApplicationMain + 312
27 AppleTV 0x00002f8d 0x0 + 12173
28 AppleTV 0x00002f30 0x0 + 12080
)
Jan 22 23:13:07 AppleTV com.apple.frontrow[98]: terminate called after throwing an instance of 'NSException'