Those trying to go through Google AdSense to generate a search box for their web site might be out of luck. According to a Google AdSense Help thread, the ability to create valid code to place on your web site, so that you can enable Google search and monetize that search on your web pages has been buggy.
Early reports came March 31st, with no answer until Friday. The first report said:
I followed step by step instructions to generate code for adsense search box, when I click Submit and get code button it isn't showing the code for adsense search box, When I click the button it becomes unclickable and shows the message 'Saving your settings', I have waited for many minutes but nothing happens, seems like it never stops saving my settings.. Tried in Firefox, IE and Chrome, not working on any of them.
Finally, this past Friday, April 9th, Google's AdSensePro Annie replied to the thread confirming the issue:
Thanks for reporting this bug. We are aware of this problem and our engineers are in the process of fixing it. In the meantime, you can generate the same code at: http://www.google.com/cse/.
We apologize for any inconvenience.
There is no ETA for the fix and it appears the issue is still there for many publishers.
So if you want to monetize your search pages, maybe try google.com/cse as a work around.
Forum discussion at Google AdSense Help.