As some of you may have experienced, our “Add a site” page has been unavailable in some locales for the past several days. This is not a site-wide or even a global issue. Unfortunately, this happened due to an update that uncovered a bug in the original code, which caused us to disable the page in one of our data centers. The good news is that we are testing a fix now and will be releasing it to production just as soon as we are sure it will not cause further complications. I will update this post when I receive word that the fix is in production.
On behalf of all of us here in the Bing Webmaster Center team, we would like to extend our apologies and thank you for your continued patience.
–Brett Yount, Bing Webmaster Center