I'm not sure whether or not someone has addressed this issue already, so let me bring it up anyway:
I wrote my website in xhtml 1.1 (yes, it is valid and named it with the proper .xhtml extension. However, upon doing so, I noticed that the text ads refuse to work. After a bit of fiddling, I found that if I rename it to a .html extension instead, the ad script works just fine. You might want to fix the script so that it works no matter the page extension.
~ Ash
I wrote my website in xhtml 1.1 (yes, it is valid and named it with the proper .xhtml extension. However, upon doing so, I noticed that the text ads refuse to work. After a bit of fiddling, I found that if I rename it to a .html extension instead, the ad script works just fine. You might want to fix the script so that it works no matter the page extension.
~ Ash