[Nexus S General] kibmcz:
Not sure where the root issue lies but i got adb debug output of the failure to obtain root... if this makes any sense LOL

12-17 11:57:53.558: D/AudioHardware(84): AudioHardware pcm playback is exiting standby.
12-17 11:57:53.558: D/AudioHardware(84): openPcmOut_l() mPcmOpenCnt: 0
12-17 11:57:53.730: D/Su.UpdaterFragment(1505): su installed to /system/bin/su
12-17 11:57:54.172: I/System(1505): Failed to destroy process 1731
12-17 11:57:54.183: I/System(1505): libcore.io.ErrnoException: kill failed: ESRCH (No such process)
12-17 11:57:54.183: I/System(1505):	at libcore.io.Posix.kill(Native Method)
12-17 11:57:54.183: I/System(1505):	at libcore.io.ForwardingOs.kill(ForwardingOs.java:77)
12-17 11:57:54.183: I/System(1505):	at java.lang.ProcessManager$ProcessImpl.destroy(ProcessManager.java:257)
12-17 11:57:54.183: I/System(1505):	at com.noshufou.android.su.UpdaterFragment.verifyFile(UpdaterFragment.java:751)
12-17 11:57:54.183: I/System(1505):	at com.noshufou.android.su.UpdaterFragment.access$12(UpdaterFragment.java:718)
12-17 11:57:54.183: I/System(1505):	at com.noshufou.android.su.UpdaterFragment$UpdateTask.doInBackground(UpdaterFragment.java:405)
12-17 11:57:54.183: I/System(1505):	at com.noshufou.android.su.UpdaterFragment$UpdateTask.doInBackground(UpdaterFragment.java:1)
12-17 11:57:54.183: I/System(1505):	at android.os.AsyncTask$2.call(AsyncTask.java:264)
12-17 11:57:54.183: I/System(1505):	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
12-17 11:57:54.183: I/System(1505):	at java.util.concurrent.FutureTask.run(FutureTask.java:137)
12-17 11:57:54.183: I/System(1505):	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
12-17 11:57:54.183: I/System(1505):	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
12-17 11:57:54.183: I/System(1505):	at java.lang.Thread.run(Thread.java:856)
12-17 11:57:54.269: D/Su.UpdaterFragment(1505): /system/bin/busybox touch /data/sutest && /system/bin/busybox echo YEAH
12-17 11:57:54.285: E/su(1732): sudb - Opening database
12-17 11:57:54.285: E/su(1732): sudb - Database opened
12-17 11:57:54.289: E/su(1732): sudb - Database closed
12-17 11:57:54.312: E/ActivityManager(156): Activity Manager Crash
12-17 11:57:54.312: E/ActivityManager(156): java.lang.IllegalArgumentException: Unknown URI type: 7
12-17 11:57:54.312: E/ActivityManager(156):	at android.net.Uri$1.createFromParcel(Uri.java:1734)
12-17 11:57:54.312: E/ActivityManager(156):	at android.net.Uri$1.createFromParcel(Uri.java:1723)
12-17 11:57:54.312: E/ActivityManager(156):	at android.content.Intent.readFromParcel(Intent.java:6131)
12-17 11:57:54.312: E/ActivityManager(156):	at android.content.Intent.<init>(Intent.java:6126)
12-17 11:57:54.312: E/ActivityManager(156):	at android.content.Intent.readFromParcel(Intent.java:6153)
12-17 11:57:54.312: E/ActivityManager(156):	at android.content.Intent.<init>(Intent.java:6126)
12-17 11:57:54.312: E/ActivityManager(156):	at android.content.Intent$1.createFromParcel(Intent.java:6117)
12-17 11:57:54.312: E/ActivityManager(156):	at android.content.Intent$1.createFromParcel(Intent.java:6115)
12-17 11:57:54.312: E/ActivityManager(156):	at android.app.ActivityManagerNative.onTransact(ActivityManagerNative.java:298)
12-17 11:57:54.312: E/ActivityManager(156):	at com.android.server.am.ActivityManagerService.onTransact(ActivityManagerService.java:1545)
12-17 11:57:54.312: E/ActivityManager(156):	at android.os.Binder.execTransact(Binder.java:338)
12-17 11:57:54.312: E/ActivityManager(156):	at dalvik.system.NativeStart.run(Native Method)
12-17 11:57:56.648: D/AudioHardware(84): AudioHardware pcm playback is going to standby.
12-17 11:57:56.648: D/AudioHardware(84): closePcmOut_l() mPcmOpenCnt: 1
12-17 11:58:00.515: D/dalvikvm(1505): GC_CONCURRENT freed 390K, 7% free 10250K/10951K, paused 4ms+5ms
12-17 11:58:18.375: D/dalvikvm(156): GC_EXPLICIT freed 1048K, 12% free 13783K/15559K, paused 3ms+4ms

Core root works... existing authorizations keep working, can remount as root, got full ddms debugging but superuser is failing to prompt for new authorizations.