Wednesday 11 April 2012 11.16pm
Guys, I experienced the same issues, but have found the solution: don't re-tune but restore factory settings instead.
I did this, and it worked fine, while re-tuning had no effect.
That's not good advice. Folks should re-tune as per recommendations
Restoring to factory settings may have fixed you and your problems - but it will wipe out all software updates and any setting folks have saved.