As of this writing, this fix works for the Android SDK that I just downloaded. This is not an error actually but a warning. It is not a show stopped and does not hinder the operation of your app. However, no developer wants to see log files like this even though it is just a warning.
To fix this warning message from appearing and happening again, go to the Util.java file of the Facebook SDK for Android library. In lines 63 and 156 change the following:
if (params.getByteArray(key) != null)
if (parameters.get(key) instanceof byte)
The value for the key picture in your Bundle params should be a byte array, not a String.