For those of you who use the Google Custom Search Engine (Google CSE), you may have run into an issue with modifying the settings for your custom search engine this morning and yesterday.

A Google Custom Search Help thread has confirmed reports of a bug that prevented users to maintain their Google CSE. There are several reports of the issue in that forum, but here is one report:

Today (january 06, 2010) when i access the URL http://www.google.com/cse/manage/all?auth=[BIG AUTH KEY HERE] to manage my custom search engine, i get ‘Server Error’:

We’re sorry.

The service you requested is currently unavailable.

Also the XML with the custom search results doesn’t work. I have a Business Acoount attached to my search engine. Thanks!

Google employee, Prathap Reddy, confirmed the issue and wrote:

I personally tried it myself and it seems to work fine. I guess at the time I tried it, it was working.

Forum discussion at Google Custom Search Help.