HuskyPup - 10:12 am on Apr 8, 2012 (gmt 0)
I've just compared 1-7 April 2012 v 17-23 April 2011 and bear in mind, for the UK, this was the start not only of Easter but an extended Royal Wedding couple of weeks when I expected earnings to drop.
It's seemingly an AdSense disaster zone therefore for the next couple of days I'm removing AdSense from my biggest URL channel.
Whatever happens my CTR will certainly improve simply because thousands of impressions delivering virtually zero clicks will be taken out of the equation.
I hoped that it would never come to this but if the option is promoting and selling my widgets v almost zero AdSense earnings, then there is no choice.