Google Adsense not happy today...

Today, Google Adsense was down for many hours. The ads were still on the woozor website but the user click were not added... :(

I also fix a terrible bug today. I had a 406 error from Google on my robots.txt page.
Let me explain :
I have an htaccess which redirect robots.txt to robots.txt.php.
But my Apache server added on the HTTP Header the real location of the robots.txt ie : Content-Location: robots.txt.php :(
I changed the htaccess and the filename robots.txt.php to robots.php an that was fixed... Wired.
Just so you know, I spend like 2 hours on that.