Forum Moderators: martinibuster
The only thing I can think of is that, for some reason, the ads are not displaying to all users. Perhaps 20-25% of my visitors have all switched to computers that doesn't support the ads? Seems far fetched, but the only explanation I can think of. Can you think of a better reason why this might happen?
Another idea might be that some ads are "broken." Some HTML programs, when you open a page to work on something else and then save it, may make changes to the AdSense code. Nothing consequential, but adding or removing a white space can make the ads stop working (probably a deliberate move on Google's part, to guard against messing withe the code.) So you might want to check to make sure that ads are displaying properly on all of your pages.