Does Single Sign on work for Facebook on Android?

I attempted single sign on with Facebook on android about 6 months ago and it was not working. Today, I try again and I'm still getting "invalid_key"

My steps:

1. Create keystore

2. Create KEY-SIGNATURE as per (http://developers.facebook.com/docs/guides/mobile/)

   keytool -exportcert -alias androiddebug开发者_JS百科key -keystore ~/.android/debug.keystore | openssl sha1 -binary | openssl base64

3. Submit KEY-SIGNATURE to developer site for my app

Has nothing changed????

i had issues with the key generation under windows. i switched under linux and did the same process and it all went good and the key worked.. this happened also to some other devs i know so its a common thing. again the same exact process but under linux instead of windows (Both xp and windows 7)