No sure if this just relevant to php though?
check mine out at:
You should see tha adsense ads down side of hotel listings if you have it enabled or blank down the side if it's disabled.
To check if you have it disabled or to re-enable it go to IE tools-internet options-security-custom level-scroll down to scripting.
Be very interesting to see what percentage of pcs do have it disabled, and what is the main reason for it,is it to stop pop ups or something?
Am I correct in thinking some browsers don't have it at all, I wonder whether they can see the ads?
I have set a poll to see what percentage of people have it disabled?