[Android Apps and Games] Noed:
Did you guys found a solution for this issue?

E/GoogleAuthUtil( 3080): GooglePlayServices not available due to error 9

E/YouTube ( 3080): GetToken error: GoogleAuthException

I'm also having it, with stock YouTube.apk

I did a factory reset recently, don't want to do again :(

Logcat:

02-15 12:26:40.660 D/dalvikvm( 3080): GC_CONCURRENT freed 1032K, 39% free 10542K/17091K, paused 20ms+7ms, total 75ms

02-15 12:26:40.660 D/dalvikvm( 3080): WAIT_FOR_CONCURRENT_GC blocked 48ms

02-15 12:26:42.683 W/e ( 3080): Signature not valid. Found:

02-15 12:26:42.683 W/e ( 3080): MIIEqDCCA5CgAwIBAgIJAJNurL4H8gHfMA0GCSqGSIb3DQEBBQUAMIGUMQswCQYDVQQGEwJVUzET

02-15 12:26:42.683 W/e ( 3080): MBEGA1UECBMKQ2FsaWZvcm5pYTEWMBQGA1UEBxMNTW91bnRhaW4gVmlldzEQMA4GA1UEChMHQW5k

02-15 12:26:42.683 W/e ( 3080): cm9pZDEQMA4GA1UECxMHQW5kcm9pZDEQMA4GA1UEAxMHQW5kcm9pZDEiMCAGCSqGSIb3DQEJARYT

02-15 12:26:42.683 W/e ( 3080): YW5kcm9pZEBhbmRyb2lkLmNvbTAeFw0wODAyMjkwMTMzNDZaFw0zNTA3MTcwMTMzNDZaMIGUMQsw

02-15 12:26:42.683 W/e ( 3080): CQYDVQQGEwJVUzETMBEGA1UECBMKQ2FsaWZvcm5pYTEWMBQGA1UEBxMNTW91bnRhaW4gVmlldzEQ

02-15 12:26:42.683 W/e ( 3080): MA4GA1UEChMHQW5kcm9pZDEQMA4GA1UECxMHQW5kcm9pZDEQMA4GA1UEAxMHQW5kcm9pZDEiMCAG

02-15 12:26:42.683 W/e ( 3080): CSqGSIb3DQEJARYTYW5kcm9pZEBhbmRyb2lkLmNvbTCCASAwDQYJKoZIhvcNAQEBBQADggENADCC

02-15 12:26:42.683 W/e ( 3080): AQgCggEBANaTGQTexgskse3HYuDZ2CU+Ps1s6x3i/waMqOi8qM1r03hupwqnbOYOuw+ZNVn/2T53

02-15 12:26:42.683 W/e ( 3080): qUPn6D1LZLjk/qLT5lbx4meoG7+yMLV4wgRDvkxyGLhG9SEVhvA4oU6Jwr44f46+z4/Kw9oe4zDJ

02-15 12:26:42.683 W/e ( 3080): 6pPQp8PcSvNQIg1QCAcy4ICXF+5qBTNZ5qaU7Cyz8oSgpGbIepTYOzEJOmc3Li9kEsBubULxWBjf

02-15 12:26:42.683 W/e ( 3080): /gOBzAzURNps3cO4JFgZSAGzJWQTT7/emMkod0jb9WdqVA2BVMi7yge54kdVMxHEa5r3b97szI5p

02-15 12:26:42.683 W/e ( 3080): 58ii0I54JiCUP5lyfTwE/nKZHZnfm644oLIXf6MdW2r+6R8CAQOjgfwwgfkwHQYDVR0OBBYEFEhZ

02-15 12:26:42.683 W/e ( 3080): AFY9JyxGrhGGBaR0GawJyowRMIHJBgNVHSMEgcEwgb6AFEhZAFY9JyxGrhGGBaR0GawJyowRoYGa

02-15 12:26:42.683 W/e ( 3080): pIGXMIGUMQswCQYDVQQGEwJVUzETMBEGA1UECBMKQ2FsaWZvcm5pYTEWMBQGA1UEBxMNTW91bnRh

02-15 12:26:42.683 W/e ( 3080): aW4gVmlldzEQMA4GA1UEChMHQW5kcm9pZDEQMA4GA1UECxMHQW5kcm9pZDEQMA4GA1UEAxMHQW5k

02-15 12:26:42.683 W/e ( 3080): cm9pZDEiMCAGCSqGSIb3DQEJARYTYW5kcm9pZEBhbmRyb2lkLmNvbYIJAJNurL4H8gHfMAwGA1Ud

02-15 12:26:42.683 W/e ( 3080): EwQFMAMBAf8wDQYJKoZIhvcNAQEFBQADggEBAHqvlozrUMRBBVEY0NqrrwFbinZaJ6cVosK0TyIU

02-15 12:26:42.683 W/e ( 3080): Ff/azgMJWr+kLfcHCHJsIGnlw27drgQAvilFLAhLwn62oX6snb4YLCBOsVMR9FXYJLZW2+TcIkCR

02-15 12:26:42.683 W/e ( 3080): LXWG/oiVHQGo/rWuWkJgU134NDEFJCJGjDbiLCpe+ZTWHdcwauTJ9pUbo8EvHRkU3cYfGmLaLfgn

02-15 12:26:42.683 W/e ( 3080): 9gP+pWA7LFQNvXwBnDa6sppCccEX31I828XzgXpJ4O+mDL1/dBd+ek8ZPUP0IgdyZm5MTYPhvVqG

02-15 12:26:42.683 W/e ( 3080): CHzzTy3sIeJFymwrsBbmg2OAUNLEMO6nwmocSdN2ClirfxqCzJOLSDE4QyS9BAH6EhY6UFcOaE0=

02-15 12:26:42.683 E/GoogleAuthUtil( 3080): GooglePlayServices not available due to error 9

02-15 12:26:42.716 E/YouTube ( 3080): GetToken error: GoogleAuthException

02-15 12:26:42.716 W/YouTube ( 3080): authentication error

02-15 12:26:42.716 W/YouTube ( 3080): com.google.android.gms.auth.GoogleAuthException: GooglePlayServices not available due to error 9

02-15 12:26:42.716 W/YouTube ( 3080): at com.google.android.gms.auth.a.a(SourceFile:185)

02-15 12:26:42.716 W/YouTube ( 3080): at com.google.android.youtube.gmsplus1.b.a(SourceFile:165)

02-15 12:26:42.716 W/YouTube ( 3080): at com.google.android.youtube.gmsplus1.b.doInBackground(SourceFile:131)

02-15 12:26:42.716 W/YouTube ( 3080): at android.os.AsyncTask$2.call(AsyncTask.java:287)

02-15 12:26:42.716 W/YouTube ( 3080): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)

02-15 12:26:42.716 W/YouTube ( 3080): at java.util.concurrent.FutureTask.run(FutureTask.java:137)

02-15 12:26:42.716 W/YouTube ( 3080): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)

02-15 12:26:42.716 W/YouTube ( 3080): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)

02-15 12:26:42.716 W/YouTube ( 3080): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)

02-15 12:26:42.716 W/YouTube ( 3080): at java.lang.Thread.run(Thread.java:856)